linux/arch/tile
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
..
configs netfilter: remove xt_NOTRACK 2012-09-03 13:36:40 +02:00
gxio arch/tile: provide kernel support for the tilegx USB shim 2012-07-18 16:40:24 -04:00
include mm: hugetlb: add arch hook for clearing page flags before entering pool 2012-10-09 16:22:24 +09:00
kernel compat: move compat_siginfo_t definition to asm/compat.h 2012-10-06 03:05:16 +09:00
kvm virtio: expose for non-virtualization users too 2011-07-23 16:20:30 +09:30
lib arch/tile: break out the "csum a long" function to <asm/checksum.h> 2012-07-11 16:04:57 -04:00
mm readahead: fault retry breaks mmap file read random detection 2012-10-09 16:22:47 +09:00
Kbuild
Kconfig Kconfig: clean up the "#if defined(arch)" list for exception-trace sysctl entry 2012-10-09 16:22:14 +09:00
Kconfig.debug lib: consolidate DEBUG_STACK_USAGE option 2011-05-25 08:39:54 -07:00
Makefile arch/tile: introduce GXIO IORPC framework for tilegx 2012-07-11 16:04:52 -04:00