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| author | Hideo AOKI <haoki@redhat.com> | 2006-04-10 22:53:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-11 06:18:32 -0700 |
| commit | 6d9f78396583244258080f3369889644c06c37c8 (patch) | |
| tree | 645f5e8630bc57e3a8f5653dc941fc0232b5e98b | |
| parent | cb45b0e966cbe747b6189c15b108901cc7d6c97c (diff) | |
| download | linux-6d9f78396583244258080f3369889644c06c37c8.tar.gz linux-6d9f78396583244258080f3369889644c06c37c8.tar.bz2 linux-6d9f78396583244258080f3369889644c06c37c8.zip | |
[PATCH] overcommit: use totalreserve_pages
This patch is an enhancement of OVERCOMMIT_GUESS algorithm in
__vm_enough_memory() in mm/mmap.c.
When the OVERCOMMIT_GUESS algorithm calculates the number of free pages,
the algorithm subtracts the number of reserved pages from the result
nr_free_pages().
Signed-off-by: Hideo Aoki <haoki@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | mm/mmap.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index eab6fcb65e11..e6ee12344b13 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -121,14 +121,26 @@ int __vm_enough_memory(long pages, int cap_sys_admin) * only call if we're about to fail. */ n = nr_free_pages(); + + /* + * Leave reserved pages. The pages are not for anonymous pages. + */ + if (n <= totalreserve_pages) + goto error; + else + n -= totalreserve_pages; + + /* + * Leave the last 3% for root + */ if (!cap_sys_admin) n -= n / 32; free += n; if (free > pages) return 0; - vm_unacct_memory(pages); - return -ENOMEM; + + goto error; } allowed = (totalram_pages - hugetlb_total_pages()) @@ -150,7 +162,7 @@ int __vm_enough_memory(long pages, int cap_sys_admin) */ if (atomic_read(&vm_committed_space) < (long)allowed) return 0; - +error: vm_unacct_memory(pages); return -ENOMEM; |