Revision bbdb396a60b2ebf7de3b717991e5d3e28c8b7bbd authored by Martin Bligh on 28 October 2006, 17:38:25 UTC, committed by Linus Torvalds on 28 October 2006, 18:30:51 UTC
If try_to_free_pages / balance_pgdat are called with a gfp_mask specifying GFP_IO and/or GFP_FS, they will reclaim the requisite number of pages, and the reset prev_priority to DEF_PRIORITY (or to some other high (ie: unurgent) value). However, another reclaimer without those gfp_mask flags set (say, GFP_NOIO) may still be struggling to reclaim pages. The concurrent overwrite of zone->prev_priority will cause this GFP_NOIO thread to unexpectedly cease deactivating mapped pages, thus causing reclaim difficulties. Fix this is to key the distress calculation not off zone->prev_priority, but also take into account the local caller's priority by using min(zone->prev_priority, sc->priority) Signed-off-by: Martin J. Bligh <mbligh@google.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 5.0 KB |
| Makefile | -rw-r--r-- | 1017 bytes |
| allocpercpu.c | -rw-r--r-- | 3.7 KB |
| backing-dev.c | -rw-r--r-- | 1.7 KB |
| bootmem.c | -rw-r--r-- | 12.0 KB |
| bounce.c | -rw-r--r-- | 6.5 KB |
| fadvise.c | -rw-r--r-- | 2.6 KB |
| filemap.c | -rw-r--r-- | 62.9 KB |
| filemap.h | -rw-r--r-- | 2.8 KB |
| filemap_xip.c | -rw-r--r-- | 10.3 KB |
| fremap.c | -rw-r--r-- | 6.1 KB |
| highmem.c | -rw-r--r-- | 7.8 KB |
| hugetlb.c | -rw-r--r-- | 19.0 KB |
| internal.h | -rw-r--r-- | 1.0 KB |
| madvise.c | -rw-r--r-- | 8.6 KB |
| memory.c | -rw-r--r-- | 71.4 KB |
| memory_hotplug.c | -rw-r--r-- | 7.3 KB |
| mempolicy.c | -rw-r--r-- | 47.0 KB |
| mempool.c | -rw-r--r-- | 9.0 KB |
| migrate.c | -rw-r--r-- | 21.3 KB |
| mincore.c | -rw-r--r-- | 4.4 KB |
| mlock.c | -rw-r--r-- | 5.3 KB |
| mmap.c | -rw-r--r-- | 54.2 KB |
| mmzone.c | -rw-r--r-- | 925 bytes |
| mprotect.c | -rw-r--r-- | 7.5 KB |
| mremap.c | -rw-r--r-- | 10.7 KB |
| msync.c | -rw-r--r-- | 2.4 KB |
| nommu.c | -rw-r--r-- | 31.3 KB |
| oom_kill.c | -rw-r--r-- | 11.5 KB |
| page-writeback.c | -rw-r--r-- | 26.8 KB |
| page_alloc.c | -rw-r--r-- | 83.5 KB |
| page_io.c | -rw-r--r-- | 4.5 KB |
| pdflush.c | -rw-r--r-- | 6.3 KB |
| prio_tree.c | -rw-r--r-- | 6.3 KB |
| readahead.c | -rw-r--r-- | 16.9 KB |
| rmap.c | -rw-r--r-- | 24.3 KB |
| shmem.c | -rw-r--r-- | 62.9 KB |
| shmem_acl.c | -rw-r--r-- | 4.6 KB |
| slab.c | -rw-r--r-- | 110.0 KB |
| slob.c | -rw-r--r-- | 7.9 KB |
| sparse.c | -rw-r--r-- | 7.2 KB |
| swap.c | -rw-r--r-- | 12.4 KB |
| swap_state.c | -rw-r--r-- | 9.3 KB |
| swapfile.c | -rw-r--r-- | 43.1 KB |
| thrash.c | -rw-r--r-- | 2.7 KB |
| tiny-shmem.c | -rw-r--r-- | 3.2 KB |
| truncate.c | -rw-r--r-- | 11.2 KB |
| util.c | -rw-r--r-- | 1.7 KB |
| vmalloc.c | -rw-r--r-- | 17.1 KB |
| vmscan.c | -rw-r--r-- | 46.9 KB |
| vmstat.c | -rw-r--r-- | 15.5 KB |
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