Revision b121186ab1b12e2a96a945d88eae0735b4542158 authored by Alex Shi on 21 August 2012, 23:16:08 UTC, committed by Linus Torvalds on 21 August 2012, 23:45:03 UTC
Commit cfd19c5a9ecf ("mm: only set page->pfmemalloc when
ALLOC_NO_WATERMARKS was used") tried to narrow down page->pfmemalloc
setting, but it missed some places the pfmemalloc should be set.
So, in __slab_alloc, the unalignment pfmemalloc and ALLOC_NO_WATERMARKS
cause incorrect deactivate_slab() on our core2 server:
64.73% fio [kernel.kallsyms] [k] _raw_spin_lock
|
--- _raw_spin_lock
|
|---0.34%-- deactivate_slab
| __slab_alloc
| kmem_cache_alloc
| |
That causes our fio sync write performance to have a 40% regression.
Move the checking in get_page_from_freelist() which resolves this issue.
Signed-off-by: Alex Shi <alex.shi@intel.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: David Miller <davem@davemloft.net
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Sage Weil <sage@inktank.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 5ed12f1
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 503 bytes |
| Makefile | -rw-r--r-- | 227 bytes |
| addr.c | -rw-r--r-- | 33.2 KB |
| caps.c | -rw-r--r-- | 84.3 KB |
| ceph_frag.c | -rw-r--r-- | 365 bytes |
| debugfs.c | -rw-r--r-- | 6.4 KB |
| dir.c | -rw-r--r-- | 36.1 KB |
| export.c | -rw-r--r-- | 6.6 KB |
| file.c | -rw-r--r-- | 23.7 KB |
| inode.c | -rw-r--r-- | 48.8 KB |
| ioctl.c | -rw-r--r-- | 7.3 KB |
| ioctl.h | -rw-r--r-- | 3.6 KB |
| locks.c | -rw-r--r-- | 7.7 KB |
| mds_client.c | -rw-r--r-- | 87.3 KB |
| mds_client.h | -rw-r--r-- | 11.7 KB |
| mdsmap.c | -rw-r--r-- | 4.3 KB |
| snap.c | -rw-r--r-- | 25.9 KB |
| strings.c | -rw-r--r-- | 3.7 KB |
| super.c | -rw-r--r-- | 23.2 KB |
| super.h | -rw-r--r-- | 26.3 KB |
| xattr.c | -rw-r--r-- | 22.4 KB |
Computing file changes ...
