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author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-12-14 17:59:19 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 08:53:19 -0800 |
commit | 6514d511dbe5a77b4bdc0a7e26fd679585112e1e (patch) | |
tree | a3fcf75191b7900043172d147fc7ed8ea97f3b4a /lib/list_debug.c | |
parent | 8dd3557a52f0bc8c960307721da307370ccad6fd (diff) |
ksm: singly-linked rmap_list
Free up a pointer in struct rmap_item, by making the mm_slot's rmap_list a
singly-linked list: we always traverse that list sequentially, and we
don't even lose any prefetches (but should consider adding a few later).
Name it rmap_list throughout.
Do we need to free up that pointer? Not immediately, and in the end, we
could continue to avoid it with a union; but having done the conversion,
let's keep it this way, since there's no downside, and maybe we'll want
more in future (struct rmap_item is a cache-friendly 32 bytes on 32-bit
and 64 bytes on 64-bit, so we shall want to avoid expanding it).
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Izik Eidus <ieidus@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/list_debug.c')
0 files changed, 0 insertions, 0 deletions