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2009-06-17Merge branch 'linus' into x86/urgentIngo Molnar1-3/+7
Merge reason: pull in latest to fix a bug in it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-16x86: mm: Read cr2 before prefetching the mmap_lockIngo Molnar1-2/+2
Prefetch instructions can generate spurious faults on certain models of older CPUs. The faults themselves cannot be stopped and they can occur pretty much anywhere - so the way we solve them is that we detect certain patterns and ignore the fault. There is one small path of code where we must not take faults though: the #PF handler execution leading up to the reading of the CR2 (the faulting address). If we take a fault there then we destroy the CR2 value (with that of the prefetching instruction's) and possibly mishandle user-space or kernel-space pagefaults. It turns out that in current upstream we do exactly that: prefetchw(&mm->mmap_sem); /* Get the faulting address: */ address = read_cr2(); This is not good. So turn around the order: first read the cr2 then prefetch the lock address. Reading cr2 is plenty fast (2 cycles) so delaying the prefetch by this amount shouldnt be a big issue performance-wise. [ And this might explain a mystery fault.c warning that sometimes occurs on one an old AMD/Semptron based test-system i have - which does have such prefetch problems. ] Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Nick Piggin <npiggin@suse.de> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Vegard Nossum <vegard.nossum@gmail.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> LKML-Reference: <20090616030522.GA22162@Krystal> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-12x86: change kernel_physical_mapping_init() __init to __meminitShaohua Li1-1/+1
kernel_physical_mapping_init() could be called in memory hotplug path. [ Impact: fix potential crash with memory hotplug ] Signed-off-by: Shaohua Li <shaohua.li@intel.com> LKML-Reference: <20090612045752.GA827@sli10-desk.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-12x86: make zap_low_mapping could be used earlyYinghai Lu1-3/+7
Only one cpu is there, just call __flush_tlb for it. Fixes the following boot warning on x86: [ 0.000000] Memory: 885032k/915540k available (5993k kernel code, 29844k reserved, 3842k data, 428k init, 0k highmem) [ 0.000000] virtual kernel memory layout: [ 0.000000] fixmap : 0xffe17000 - 0xfffff000 (1952 kB) [ 0.000000] vmalloc : 0xf8615000 - 0xffe15000 ( 120 MB) [ 0.000000] lowmem : 0xc0000000 - 0xf7e15000 ( 894 MB) [ 0.000000] .init : 0xc19a5000 - 0xc1a10000 ( 428 kB) [ 0.000000] .data : 0xc15da4bb - 0xc199af6c (3842 kB) [ 0.000000] .text : 0xc1000000 - 0xc15da4bb (5993 kB) [ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok. [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: at kernel/smp.c:369 smp_call_function_many+0x50/0x1b0() [ 0.000000] Hardware name: System Product Name [ 0.000000] Modules linked in: [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.30-tip #52504 [ 0.000000] Call Trace: [ 0.000000] [<c104aa16>] warn_slowpath_common+0x65/0x95 [ 0.000000] [<c104aa58>] warn_slowpath_null+0x12/0x15 [ 0.000000] [<c1073bbe>] smp_call_function_many+0x50/0x1b0 [ 0.000000] [<c1037615>] ? do_flush_tlb_all+0x0/0x41 [ 0.000000] [<c1037615>] ? do_flush_tlb_all+0x0/0x41 [ 0.000000] [<c1073d4f>] smp_call_function+0x31/0x58 [ 0.000000] [<c1037615>] ? do_flush_tlb_all+0x0/0x41 [ 0.000000] [<c104f635>] on_each_cpu+0x26/0x65 [ 0.000000] [<c10374b5>] flush_tlb_all+0x19/0x1b [ 0.000000] [<c1032ab3>] zap_low_mappings+0x4d/0x56 [ 0.000000] [<c15d64b5>] ? printk+0x14/0x17 [ 0.000000] [<c19b42a8>] mem_init+0x23d/0x245 [ 0.000000] [<c19a56a1>] start_kernel+0x17a/0x2d5 [ 0.000000] [<c19a5347>] ? unknown_bootoption+0x0/0x19a [ 0.000000] [<c19a5039>] __init_begin+0x39/0x41 [ 0.000000] ---[ end trace 4eaa2a86a8e2da22 ]--- Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-11Merge branch 'perfcounters-for-linus' of ↵Linus Torvalds1-2/+10
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (574 commits) perf_counter: Turn off by default perf_counter: Add counter->id to the throttle event perf_counter: Better align code perf_counter: Rename L2 to LL cache perf_counter: Standardize event names perf_counter: Rename enums perf_counter tools: Clean up u64 usage perf_counter: Rename perf_counter_limit sysctl perf_counter: More paranoia settings perf_counter: powerpc: Implement generalized cache events for POWER processors perf_counters: powerpc: Add support for POWER7 processors perf_counter: Accurate period data perf_counter: Introduce struct for sample data perf_counter tools: Normalize data using per sample period data perf_counter: Annotate exit ctx recursion perf_counter tools: Propagate signals properly perf_counter tools: Small frequency related fixes perf_counter: More aggressive frequency adjustment perf_counter/x86: Fix the model number of Intel Core2 processors perf_counter, x86: Correct some event and umask values for Intel processors ...
2009-06-11Merge branch 'linus' into perfcounters/coreIngo Molnar13-330/+190
Conflicts: arch/x86/kernel/irqinit.c arch/x86/kernel/irqinit_64.c arch/x86/kernel/traps.c arch/x86/mm/fault.c include/linux/sched.h kernel/exit.c
2009-06-11perf_counter: Standardize event namesPeter Zijlstra1-3/+3
Pure renames only, to PERF_COUNT_HW_* and PERF_COUNT_SW_*. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-11x86: memtest: use pointers of equal type for comparisonThomas Gleixner1-5/+4
Commit c9690998ef48ffefeccb91c70a7739eebdea57f9 (x86: memtest: remove 64-bit division) introduced following compile warning: arch/x86/mm/memtest.c: In function 'memtest': arch/x86/mm/memtest.c:56: warning: comparison of distinct pointer types lacks a cast arch/x86/mm/memtest.c:58: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-06-10Merge branch 'tracing-for-linus' of ↵Linus Torvalds2-43/+63
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (244 commits) Revert "x86, bts: reenable ptrace branch trace support" tracing: do not translate event helper macros in print format ftrace/documentation: fix typo in function grapher name tracing/events: convert block trace points to TRACE_EVENT(), fix !CONFIG_BLOCK tracing: add protection around module events unload tracing: add trace_seq_vprint interface tracing: fix the block trace points print size tracing/events: convert block trace points to TRACE_EVENT() ring-buffer: fix ret in rb_add_time_stamp ring-buffer: pass in lockdep class key for reader_lock tracing: add annotation to what type of stack trace is recorded tracing: fix multiple use of __print_flags and __print_symbolic tracing/events: fix output format of user stack tracing/events: fix output format of kernel stack tracing/trace_stack: fix the number of entries in the header ring-buffer: discard timestamps that are at the start of the buffer ring-buffer: try to discard unneeded timestamps ring-buffer: fix bug in ring_buffer_discard_commit ftrace: do not profile functions when disabled tracing: make trace pipe recognize latency format flag ...
2009-06-10Merge branch 'x86-xen-for-linus' of ↵Linus Torvalds4-21/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-xen-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (42 commits) xen: cache cr0 value to avoid trap'n'emulate for read_cr0 xen/x86-64: clean up warnings about IST-using traps xen/x86-64: fix breakpoints and hardware watchpoints xen: reserve Xen start_info rather than e820 reserving xen: add FIX_TEXT_POKE to fixmap lguest: update lazy mmu changes to match lguest's use of kvm hypercalls xen: honour VCPU availability on boot xen: add "capabilities" file xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yet xen/sys/hypervisor: change writable_pt to features xen: add /sys/hypervisor support xen/xenbus: export xenbus_dev_changed xen: use device model for suspending xenbus devices xen: remove suspend_cancel hook xen/dev-evtchn: clean up locking in evtchn xen: export ioctl headers to userspace xen: add /dev/xen/evtchn driver xen: add irq_from_evtchn xen: clean up gate trap/interrupt constants xen: set _PAGE_NX in __supported_pte_mask before pagetable construction ...
2009-06-10Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds1-7/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Clear TS in irq_ts_save() when in an atomic section x86: Detect use of extended APIC ID for AMD CPUs x86: memtest: remove 64-bit division x86, UV: Fix macros for multiple coherency domains x86: Fix non-lazy GS handling in sys_vm86() x86: Add quirk for reboot stalls on a Dell Optiplex 360 x86: Fix UV BAU activation descriptor init
2009-06-10Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds7-258/+116
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits) x86: fix system without memory on node0 x86, mm: Fix node_possible_map logic mm, x86: remove MEMORY_HOTPLUG_RESERVE related code x86: make sparse mem work in non-NUMA mode x86: process.c, remove useless headers x86: merge process.c a bit x86: use sparse_memory_present_with_active_regions() on UMA x86: unify 64-bit UMA and NUMA paging_init() x86: Allow 1MB of slack between the e820 map and SRAT, not 4GB x86: Sanity check the e820 against the SRAT table using e820 map only x86: clean up and and print out initial max_pfn_mapped x86/pci: remove rounding quirk from e820_setup_gap() x86, e820, pci: reserve extra free space near end of RAM x86: fix typo in address space documentation x86: 46 bit physical address support on 64 bits x86, mm: fault.c, use printk_once() in is_errata93() x86: move per-cpu mmu_gathers to mm/init.c x86: move max_pfn_mapped and max_low_pfn_mapped to setup.c x86: unify noexec handling x86: remove (null) in /sys kernel_page_tables ...
2009-06-10Merge branch 'x86-cleanups-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, nmi: Use predefined numbers instead of hardcoded one x86: asm/processor.h: remove double declaration x86, mtrr: replace MTRRdefType_MSR with msr-index's MSR_MTRRdefType x86, mtrr: replace MTRRfix4K_C0000_MSR with msr-index's MSR_MTRRfix4K_C0000 x86, mtrr: remove mtrr MSRs double declaration x86, mtrr: replace MTRRfix16K_80000_MSR with msr-index's MSR_MTRRfix16K_80000 x86, mtrr: replace MTRRfix64K_00000_MSR with msr-index's MSR_MTRRfix64K_00000 x86, mtrr: replace MTRRcap_MSR with msr-index's MSR_MTRRcap x86: mce: remove duplicated #include x86: msr-index.h remove duplicate MSR C001_0015 declaration x86: clean up arch/x86/kernel/tsc_sync.c a bit x86: use symbolic name for VM86_SIGNAL when used as vm86 default return x86: added 'ifndef _ASM_X86_IOMAP_H' to iomap.h x86: avoid multiple declaration of kstack_depth_to_print x86: vdso/vma.c declare vdso_enabled and arch_setup_additional_pages before they get used x86: clean up declarations and variables x86: apic/x2apic_cluster.c x86_cpu_to_logical_apicid should be static x86 early quirks: eliminate unused function
2009-06-08x86: memtest: remove 64-bit divisionAndreas Herrmann1-7/+7
Using gcc 3.3.5 a "make allmodconfig" + "CONFIG_KVM=n" triggers a build error: arch/x86/mm/built-in.o(.init.text+0x43f7): In function `__change_page_attr': arch/x86/mm/pageattr.c:114: undefined reference to `__udivdi3' make: *** [.tmp_vmlinux1] Error 1 The culprit turned out to be a division in arch/x86/mm/memtest.c For more info see this thread: http://marc.info/?l=linux-kernel&m=124416232620683 The patch entirely removes the division that caused the build error. [ Impact: build fix with certain GCC versions ] Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: xiyou.wangcong@gmail.com Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@kernel.org> LKML-Reference: <20090608170939.GB12431@alberich.amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-01Merge branch 'linus' into perfcounters/coreIngo Molnar2-10/+9
Merge reason: merge almost-rc8 into perfcounters/core, which was -rc6 based - to pick up the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-29x86: ignore VM_LOCKED when determining if hugetlb-backed page tables can be ↵Mel Gorman1-1/+5
shared or not Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13302 On x86 and x86-64, it is possible that page tables are shared beween shared mappings backed by hugetlbfs. As part of this, page_table_shareable() checks a pair of vma->vm_flags and they must match if they are to be shared. All VMA flags are taken into account, including VM_LOCKED. The problem is that VM_LOCKED is cleared on fork(). When a process with a shared memory segment forks() to exec() a helper, there will be shared VMAs with different flags. The impact is that the shared segment is sometimes considered shareable and other times not, depending on what process is checking. What happens is that the segment page tables are being shared but the count is inaccurate depending on the ordering of events. As the page tables are freed with put_page(), bad pmd's are found when some of the children exit. The hugepage counters also get corrupted and the Total and Free count will no longer match even when all the hugepage-backed regions are freed. This requires a reboot of the machine to "fix". This patch addresses the problem by comparing all flags except VM_LOCKED when deciding if pagetables should be shared or not for hugetlbfs-backed mapping. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <starlight@binnacle.cx> Cc: Eric B Munson <ebmunson@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-26x86: avoid back to back on_each_cpu in cpa_flush_arrayPallipadi, Venkatesh1-14/+3
Cleanup cpa_flush_array() to avoid back to back on_each_cpu() calls. [ Impact: optimizes fix 0af48f42df15b97080b450d24219dd95db7b929a ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-22x86: cpa_flush_array wbinvd should be done on all CPUsvenkatesh.pallipadi@intel.com1-1/+7
cpa_flush_array seems to prefer wbinvd() over clflush at 4M threshold. clflush needs to be done on only one CPU as per instruction definition. wbinvd() however, should be done on all CPUs. [ Impact: fix missing flush which could cause data corruption ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-22x86: bugfix wbinvd() model check instead of family checkvenkatesh.pallipadi@intel.com1-2/+2
wbinvd is supported on all CPUs 486 or later. But, pageattr.c is checking x86_model >= 4 before wbinvd(), which looks like an oversight bug. It was first introduced at one place by changeset d7c8f21a8cad0228c7c5ce2bb6dbd95d1ee49d13 and got copied over to second place in the same file later. [ Impact: fix missing cache flush on early-model CPUs, potential data corruption ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-18Merge commit 'v2.6.30-rc6' into tracing/coreIngo Molnar3-2/+19
Merge reason: we were on an -rc4 base, sync up to -rc6 Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-18x86, mm: Fix node_possible_map logicYinghai Lu2-30/+12
Recently there were some changes to the meaning of node_possible_map, and it is quite strange: - the node without memory would be set in node_possible_map - but some node with less NODE_MIN_SIZE will be kicked out of node_possible_map. fix it by adding strict_setup_node_bootmem(). Also, remove unparse_node(). so result will be: 1. cpu_to_node() will return online node only (nearest one) 2. apicid_to_node() still returns the node that could be not online but is set in node_possible_map. 3. node_possible_map will include nodes that mem on it are less NODE_MIN_SIZE v2: after move_cpus_to_node change. [ Impact: get node_possible_map right ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Jack Steiner <steiner@sgi.com> LKML-Reference: <4A0C49BE.6080800@kernel.org> [ v3: various small cleanups and comment clarifications ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-18mm, x86: remove MEMORY_HOTPLUG_RESERVE related codeYinghai Lu2-56/+12
after: | commit b263295dbffd33b0fbff670720fa178c30e3392a | Author: Christoph Lameter <clameter@sgi.com> | Date: Wed Jan 30 13:30:47 2008 +0100 | | x86: 64-bit, make sparsemem vmemmap the only memory model we don't have MEMORY_HOTPLUG_RESERVE anymore. Historically, x86-64 had an architecture-specific method for memory hotplug whereby it scanned the SRAT for physical memory ranges that could be potentially used for memory hot-add later. By reserving those ranges without physical memory, the memmap would be allocated and left dormant until needed. This depended on the DISCONTIG memory model which has been removed so the code implementing HOTPLUG_RESERVE is now dead. This patch removes the dead code used by MEMORY_HOTPLUG_RESERVE. (Changelog authored by Mel.) v2: updated changelog, and remove hotadd= in doc [ Impact: remove dead code ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: Mel Gorman <mel@csn.ul.ie> Workflow-found-OK-by: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A0C4910.7090508@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-18Merge commit 'v2.6.30-rc6' into perfcounters/coreIngo Molnar4-3/+20
Merge reason: this branch was on an -rc4 base, merge it up to -rc6 to get the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-12x86: make sparse mem work in non-NUMA modeShaohua Li1-2/+2
With sparse memory, holes should not be marked present for memmap. This patch makes sure sparsemem really works on SMP mode (!NUMA). [ Impact: use less memory to map fragmented RAM, avoid boot-OOM/crash ] Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Sheng Yang <sheng.yang@intel.com> LKML-Reference: <1242117600.22431.0.camel@sli10-desk.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11x86: use sparse_memory_present_with_active_regions() on UMAPekka Enberg1-4/+0
There's no need to use call memory_present() manually on UMA because initmem_init() sets up early_node_map by calling e820_register_active_regions(). [ Impact: cleanup ] Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1241699742.17846.31.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11x86: unify 64-bit UMA and NUMA paging_init()Pekka Enberg2-16/+5
64-bit UMA and NUMA versions of paging_init() are almost identical. Therefore, merge the copy in mm/numa_64.c to mm/init_64.c to remove duplicate code. [ Impact: cleanup ] Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1241699741.17846.30.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11x86: Allow 1MB of slack between the e820 map and SRAT, not 4GBYinghai Lu1-2/+2
It is expected that there might be slight differences between the e820 map and the SRAT table and the intention was that 1MB of slack be allowed. The calculation comparing e820ram and pxmram assumes the units are bytes, when they are in fact pages. This means 4GB of slack is being allowed, not 1MB. This patch makes the correct comparison. comment is from Mel. [ Impact: don't accept buggy SRATs that could dump up to 4G of RAM ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A03E13E.6050107@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11x86: Sanity check the e820 against the SRAT table using e820 map onlyYinghai Lu1-1/+1
node_cover_memory() sanity checks the SRAT table by ensuring that all PXMs cover the memory reported in the e820. However, when calculating the size of the holes in the e820, it uses the early_node_map[] which contains information taken from both SRAT and e820. If the SRAT is missing an entry, then it is not detected that the SRAT table is incorrect and missing entries. This patch uses the e820 map to calculate the holes instead of early_node_map[]. comment is from Mel. [ Impact: reject incorrect SRAT tables ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A03E10C.60906@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11x86: clean up and and print out initial max_pfn_mappedYinghai Lu1-4/+3
Do this so we can check the range that is mapped before init_memory_mapping(). To be able to print out meaningful info, we first have to fix 64-bit to have max_pfn_mapped assigned before that call. This also unifies the code-path a bit. [ Impact: print more debug info, cleanup ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <49BF0978.40605@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11Merge commit 'v2.6.30-rc5' into x86/mmIngo Molnar6-5/+29
Merge reason: this branch was on a .30-rc2 base - sync it up with all the latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-08Merge branch 'x86/urgent' into x86/xenIngo Molnar11-228/+176
Conflicts: arch/frv/include/asm/pgtable.h arch/x86/include/asm/required-features.h arch/x86/xen/mmu.c Merge reason: x86/xen was on a .29 base still, move it to a fresher branch and pick up Xen fixes as well, plus resolve conflicts Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-07x86-64: finish cleanup_highmaps()'s job wrt. _brk_endJan Beulich1-1/+17
With the introduction of the .brk section, special care must be taken that no unused page table entries remain if _brk_end and _end are separated by a 2M page boundary. cleanup_highmap() runs very early and hence cannot take care of that, hence potential entries needing to be removed past _brk_end must be cleared once the brk allocator has done its job. [ Impact: avoids undesirable TLB aliases ] Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-07Merge branch 'linus' into tracing/coreIngo Molnar7-214/+125
Merge reason: tracing/core was on a .30-rc1 base and was missing out on on a handful of tracing fixes present in .30-rc5-almost. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-06x86: Fix a typo in a printk messageNikanth Karthikesan1-1/+1
[ Impact: printk message cleanup ] Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> LKML-Reference: <200905040908.27299.knikanth@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-06x86, srat: do not register nodes beyond e820 mapDavid Rientjes1-0/+1
The mem= option will truncate the memory map at a specified address so it's not possible to register nodes with memory beyond the e820 upper bound. unparse_node() is only called when then node had memory associated with it, although with the mem= option it is no longer addressable. [ Impact: fix boot hang on certain (large) systems ] Reported-by: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Jack Steiner <steiner@sgi.com> LKML-Reference: <alpine.DEB.2.00.0905051248150.20021@chino.kir.corp.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-05Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tracing: x86, mmiotrace: fix range test tracing: fix ref count in splice pages
2009-05-03x86, mm: fault.c, use printk_once() in is_errata93()Ingo Molnar1-6/+1
Andrew pointed out that the 'once' variable has a needlessly function-global scope. We can in fact eliminate it completely, via the use of printk_once(). [ Impact: cleanup ] Reported-by: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30x86: move per-cpu mmu_gathers to mm/init.cPekka Enberg3-3/+3
[ Impact: cleanup ] Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1240923650.1982.22.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-30x86: move max_pfn_mapped and max_low_pfn_mapped to setup.cPekka Enberg2-11/+1
This patch moves the max_pfn_mapped and max_low_pfn_mapped global variables to kernel/setup.c where they're initialized. [ Impact: cleanup ] Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1240923649.1982.21.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29Merge branch 'linus' into perfcounters/coreIngo Molnar8-225/+156
Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29tracing: x86, mmiotrace: only register for die notifier when tracer activeStuart Bennett2-5/+24
Follow up to afcfe024aebd74b0984a41af9a34e009cf5badaf in Linus' tree ("x86: mmiotrace: quieten spurious warning message") Signed-off-by: Stuart Bennett <stuart@freedesktop.org> Acked-by: Pekka Paalanen <pq@iki.fi> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1240946271-7083-5-git-send-email-stuart@freedesktop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29tracing: x86, mmiotrace: refactor clearing/restore of page presenceStuart Bennett1-21/+22
* change function names to clear_* from set_*: in reality we only clear and restore page presence, and never unconditionally set present. Using clear_*({true, false}, ...) is therefore more honest than set_*({false, true}, ...) * upgrade presence storage to pteval_t: doing user-space tracing will require saving and manipulation of the _PAGE_PROTNONE bit, in addition to the existing _PAGE_PRESENT changes, and having multiple bools stored and passed around does not seem optimal [ Impact: refactor, clean up mmiotrace code ] Signed-off-by: Stuart Bennett <stuart@freedesktop.org> Acked-by: Pekka Paalanen <pq@iki.fi> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1240946271-7083-4-git-send-email-stuart@freedesktop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29tracing: x86, mmiotrace: code consistency/legibility improvementStuart Bennett1-17/+17
kmmio_probe being *p and kmmio_fault_page being sometimes *f and sometimes *p is not helpful. [ Impact: cleanup ] Signed-off-by: Stuart Bennett <stuart@freedesktop.org> Acked-by: Pekka Paalanen <pq@iki.fi> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1240946271-7083-3-git-send-email-stuart@freedesktop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-29tracing: x86, mmiotrace: fix range testStuart Bennett1-1/+1
Matching on (addr == (p->addr + p->len)) causes problems when mappings are adjacent. [ Impact: fix mmiotrace confusion on adjacent iomaps ] Signed-off-by: Stuart Bennett <stuart@freedesktop.org> Acked-by: Pekka Paalanen <pq@iki.fi> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1240946271-7083-2-git-send-email-stuart@freedesktop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-23x86: check boundary in setup_node_bootmem()Yinghai Lu1-0/+3
Commit dc09855 ("x86/uv: fix init of memory-less nodes") causes a two sockets system (where node-1 doesn't have RAM installed) to crash. That commit makes node_possible include cpu nodes that do not have memory. So check boundary in setup_node_bootmem(). [ Impact: fix boot crash on RAM-less NUMA node system ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Jack Steiner <steiner@sgi.com> LKML-Reference: <49EF89DF.9090404@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21x86: unify noexec handlingPekka Enberg3-89/+63
This patch unifies noexec handling on 32-bit and 64-bit. [ Impact: cleanup ] Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> [ mingo@elte.hu: build fix ] LKML-Reference: <1240303167.771.69.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-21Merge branch 'linus' into x86/mmIngo Molnar14-386/+334
Merge reason: refresh the topic: there's been 290 non-merges commits upstream to arch/x86 alone. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-20Merge branch 'linus' into x86/urgentIngo Molnar3-12/+16
Merge reason: We need the x86/uv updates from upstream, to queue up dependent fix. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17x86: mm/numa_32.c calculate_numa_remap_pages should use __initJaswinder Singh Rajput1-1/+1
calculate_numa_remap_pages() is called only by __init initmem_init() further calculate_numa_remap_pages is calling: __init find_e820_area() and __init reserve_early() So calculate_numa_remap_pages() should be __init calculate_numa_remap_pages(). WARNING: arch/x86/built-in.o(.text+0x82ea3): Section mismatch in reference from the function calculate_numa_remap_pages() to the function .init.text:find_e820_area() The function calculate_numa_remap_pages() references the function __init find_e820_area(). This is often because calculate_numa_remap_pages lacks a __init annotation or the annotation of find_e820_area is wrong. WARNING: arch/x86/built-in.o(.text+0x82f5f): Section mismatch in reference from the function calculate_numa_remap_pages() to the function .init.text:reserve_early() The function calculate_numa_remap_pages() references the function __init reserve_early(). This is often because calculate_numa_remap_pages lacks a __init annotation or the annotation of reserve_early is wrong. [ Impact: save memory, address Section mismatch warning ] Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> LKML-Reference: <1239991281.3153.4.camel@ht.satnam> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-04-17x86/uv: fix init of memory-less nodesJack Steiner1-1/+5
Add support for nodes that have cpus but no memory. The current code was failing to add these nodes to the nodes_present_map. v2: Fixes case caught by David Rientjes - missed support for the x2apic SRAT table. [ Impact: fix potential boot crash on memory-less UV nodes. ] Reported-by: David Rientjes <rientjes@google.com> Signed-off-by: Jack Steiner <steiner@sgi.com> LKML-Reference: <20090417142242.GA23743@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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