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| author | Rik van Riel <riel@redhat.com> | 2005-11-28 13:44:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-28 14:42:25 -0800 |
| commit | f7b7fd8f3ebbb2810d6893295aa984acd0fd30db (patch) | |
| tree | 01afc1edafc50a3c65ec8576c05c60da53d8d242 /mm/thrash.c | |
| parent | a93a117eaa0bec426d4671a49bfa96a6fdcd2ac9 (diff) | |
| download | linux-f7b7fd8f3ebbb2810d6893295aa984acd0fd30db.tar.gz linux-f7b7fd8f3ebbb2810d6893295aa984acd0fd30db.tar.bz2 linux-f7b7fd8f3ebbb2810d6893295aa984acd0fd30db.zip | |
[PATCH] temporarily disable swap token on memory pressure
Some users (hi Zwane) have seen a problem when running a workload that
eats nearly all of physical memory - th system does an OOM kill, even
when there is still a lot of swap free.
The problem appears to be a very big task that is holding the swap
token, and the VM has a very hard time finding any other page in the
system that is swappable.
Instead of ignoring the swap token when sc->priority reaches 0, we could
simply take the swap token away from the memory hog and make sure we
don't give it back to the memory hog for a few seconds.
This patch resolves the problem Zwane ran into.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/thrash.c')
| -rw-r--r-- | mm/thrash.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/mm/thrash.c b/mm/thrash.c index eff3c18c33a1..f4c560b4a2b7 100644 --- a/mm/thrash.c +++ b/mm/thrash.c @@ -57,14 +57,17 @@ void grab_swap_token(void) /* We have the token. Let others know we still need it. */ if (has_swap_token(current->mm)) { current->mm->recent_pagein = 1; + if (unlikely(!swap_token_default_timeout)) + disable_swap_token(); return; } if (time_after(jiffies, swap_token_check)) { - /* Can't get swapout protection if we exceed our RSS limit. */ - // if (current->mm->rss > current->mm->rlimit_rss) - // return; + if (!swap_token_default_timeout) { + swap_token_check = jiffies + SWAP_TOKEN_CHECK_INTERVAL; + return; + } /* ... or if we recently held the token. */ if (time_before(jiffies, current->mm->swap_token_time)) @@ -95,6 +98,7 @@ void __put_swap_token(struct mm_struct *mm) { spin_lock(&swap_token_lock); if (likely(mm == swap_token_mm)) { + mm->swap_token_time = jiffies + SWAP_TOKEN_CHECK_INTERVAL; swap_token_mm = &init_mm; swap_token_check = jiffies; } |