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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 /include/linux/swap.h | |
| parent | a93a117eaa0bec426d4671a49bfa96a6fdcd2ac9 (diff) | |
| download | lwn-f7b7fd8f3ebbb2810d6893295aa984acd0fd30db.tar.gz lwn-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 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 20c975642cab..508668f840b6 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -239,6 +239,11 @@ static inline void put_swap_token(struct mm_struct *mm) __put_swap_token(mm); } +static inline void disable_swap_token(void) +{ + put_swap_token(swap_token_mm); +} + #else /* CONFIG_SWAP */ #define total_swap_pages 0 @@ -283,6 +288,7 @@ static inline swp_entry_t get_swap_page(void) #define put_swap_token(x) do { } while(0) #define grab_swap_token() do { } while(0) #define has_swap_token(x) 0 +#define disable_swap_token() do { } while(0) #endif /* CONFIG_SWAP */ #endif /* __KERNEL__*/ |