diff options
Diffstat (limited to 'Documentation/vm/page-types.c')
| -rw-r--r-- | Documentation/vm/page-types.c | 83 |
1 files changed, 56 insertions, 27 deletions
diff --git a/Documentation/vm/page-types.c b/Documentation/vm/page-types.c index ea44ea502da1..66e9358e2144 100644 --- a/Documentation/vm/page-types.c +++ b/Documentation/vm/page-types.c @@ -1,11 +1,22 @@ /* * page-types: Tool for querying page flags * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should find a copy of v2 of the GNU General Public License somewhere on + * your Linux system; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * * Copyright (C) 2009 Intel corporation * * Authors: Wu Fengguang <fengguang.wu@intel.com> - * - * Released under the General Public License (GPL). */ #define _LARGEFILE64_SOURCE @@ -100,7 +111,7 @@ #define BIT(name) (1ULL << KPF_##name) #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) -static char *page_flag_names[] = { +static const char *page_flag_names[] = { [KPF_LOCKED] = "L:locked", [KPF_ERROR] = "E:error", [KPF_REFERENCED] = "R:referenced", @@ -173,7 +184,7 @@ static int kpageflags_fd; static int opt_hwpoison; static int opt_unpoison; -static char *hwpoison_debug_fs = "/debug/hwpoison"; +static const char hwpoison_debug_fs[] = "/debug/hwpoison"; static int hwpoison_inject_fd; static int hwpoison_forget_fd; @@ -560,7 +571,7 @@ static void walk_pfn(unsigned long voffset, { uint64_t buf[KPAGEFLAGS_BATCH]; unsigned long batch; - unsigned long pages; + long pages; unsigned long i; while (count) { @@ -673,30 +684,35 @@ static void usage(void) printf( "page-types [options]\n" -" -r|--raw Raw mode, for kernel developers\n" -" -a|--addr addr-spec Walk a range of pages\n" -" -b|--bits bits-spec Walk pages with specified bits\n" -" -p|--pid pid Walk process address space\n" +" -r|--raw Raw mode, for kernel developers\n" +" -d|--describe flags Describe flags\n" +" -a|--addr addr-spec Walk a range of pages\n" +" -b|--bits bits-spec Walk pages with specified bits\n" +" -p|--pid pid Walk process address space\n" #if 0 /* planned features */ -" -f|--file filename Walk file address space\n" +" -f|--file filename Walk file address space\n" #endif -" -l|--list Show page details in ranges\n" -" -L|--list-each Show page details one by one\n" -" -N|--no-summary Don't show summay info\n" -" -X|--hwpoison hwpoison pages\n" -" -x|--unpoison unpoison pages\n" -" -h|--help Show this usage message\n" +" -l|--list Show page details in ranges\n" +" -L|--list-each Show page details one by one\n" +" -N|--no-summary Don't show summay info\n" +" -X|--hwpoison hwpoison pages\n" +" -x|--unpoison unpoison pages\n" +" -h|--help Show this usage message\n" +"flags:\n" +" 0x10 bitfield format, e.g.\n" +" anon bit-name, e.g.\n" +" 0x10,anon comma-separated list, e.g.\n" "addr-spec:\n" -" N one page at offset N (unit: pages)\n" -" N+M pages range from N to N+M-1\n" -" N,M pages range from N to M-1\n" -" N, pages range from N to end\n" -" ,M pages range from 0 to M-1\n" +" N one page at offset N (unit: pages)\n" +" N+M pages range from N to N+M-1\n" +" N,M pages range from N to M-1\n" +" N, pages range from N to end\n" +" ,M pages range from 0 to M-1\n" "bits-spec:\n" -" bit1,bit2 (flags & (bit1|bit2)) != 0\n" -" bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" -" bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" -" =bit1,bit2 flags == (bit1|bit2)\n" +" bit1,bit2 (flags & (bit1|bit2)) != 0\n" +" bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" +" bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" +" =bit1,bit2 flags == (bit1|bit2)\n" "bit-names:\n" ); @@ -884,13 +900,23 @@ static void parse_bits_mask(const char *optarg) add_bits_filter(mask, bits); } +static void describe_flags(const char *optarg) +{ + uint64_t flags = parse_flag_names(optarg, 0); + + printf("0x%016llx\t%s\t%s\n", + (unsigned long long)flags, + page_flag_name(flags), + page_flag_longname(flags)); +} -static struct option opts[] = { +static const struct option opts[] = { { "raw" , 0, NULL, 'r' }, { "pid" , 1, NULL, 'p' }, { "file" , 1, NULL, 'f' }, { "addr" , 1, NULL, 'a' }, { "bits" , 1, NULL, 'b' }, + { "describe" , 1, NULL, 'd' }, { "list" , 0, NULL, 'l' }, { "list-each" , 0, NULL, 'L' }, { "no-summary", 0, NULL, 'N' }, @@ -907,7 +933,7 @@ int main(int argc, char *argv[]) page_size = getpagesize(); while ((c = getopt_long(argc, argv, - "rp:f:a:b:lLNXxh", opts, NULL)) != -1) { + "rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) { switch (c) { case 'r': opt_raw = 1; @@ -924,6 +950,9 @@ int main(int argc, char *argv[]) case 'b': parse_bits_mask(optarg); break; + case 'd': + describe_flags(optarg); + exit(0); case 'l': opt_list = 1; break; |