linux-sg2042/arch/avr32/mm
Shaohua Li 45cac65b0f readahead: fault retry breaks mmap file read random detection
.fault now can retry.  The retry can break state machine of .fault.  In
filemap_fault, if page is miss, ra->mmap_miss is increased.  In the second
try, since the page is in page cache now, ra->mmap_miss is decreased.  And
these are done in one fault, so we can't detect random mmap file access.

Add a new flag to indicate .fault is tried once.  In the second try, skip
ra->mmap_miss decreasing.  The filemap_fault state machine is ok with it.

I only tested x86, didn't test other archs, but looks the change for other
archs is obvious, but who knows :)

Signed-off-by: Shaohua Li <shaohua.li@fusionio.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-10-09 16:22:47 +09:00
..
Makefile [PATCH] avr32 architecture 2006-09-26 08:48:54 -07:00
cache.c mm: Fix out-of-date comments which refers non-existent functions 2011-02-17 16:54:39 +01:00
clear_page.S [PATCH] avr32 architecture 2006-09-26 08:48:54 -07:00
copy_page.S [PATCH] avr32 architecture 2006-09-26 08:48:54 -07:00
dma-coherent.c avr32: add export.h to arch/avr32 for EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:59 -04:00
fault.c readahead: fault retry breaks mmap file read random detection 2012-10-09 16:22:47 +09:00
init.c mm: now that all old mmu_gather code is gone, remove the storage 2011-05-25 08:39:16 -07:00
ioremap.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
tlb.c MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself 2010-02-20 16:41:46 +00:00