linux/arch/avr32
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
..
boards avr32: fix build error in ATSTK1002 code 2012-07-30 17:25:13 -07:00
boot Kbuild: centralize MKIMAGE and cmd_uimage definitions 2012-03-26 15:49:20 +02:00
configs rtc: fix build warnings in defconfigs 2011-06-15 20:04:02 -07:00
include cross-arch: don't corrupt personality flags upon exec() 2012-10-06 03:04:47 +09:00
kernel fixups for signal breakage 2012-06-04 17:47:34 -04:00
lib asm-generic: rename generic little-endian bitops functions 2011-03-23 19:46:11 -07:00
mach-at32ap avr32: fix build failures from mis-naming of atmel_nand.h 2012-04-02 14:41:25 -07:00
mm readahead: fault retry breaks mmap file read random detection 2012-10-09 16:22:47 +09:00
oprofile Disintegrate asm/system.h for AVR32 2012-03-28 18:30:01 +01:00
Kconfig ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION 2012-07-30 17:25:21 -07:00
Kconfig.debug [AVR32] Include instrumentation menu 2008-01-25 08:31:40 +01:00
Makefile kbuild: allow assignment to {A,C,LD}FLAGS_MODULE on the command line 2010-08-03 14:09:45 +02:00