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authorFengguang Wu <wfg@mail.ustc.edu.cn>2007-07-19 01:47:58 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 10:04:43 -0700
commitf615bfca468c9b80ed2d09be5fdbaf470a32c045 (patch)
tree4771fd91ae020efaafbe653ad78ba5e32d56e8a3 /mm/vmstat.c
parent46fc3e7b4e7233a0ac981ac9084b55217318d04d (diff)
readahead: MIN_RA_PAGES/MAX_RA_PAGES macros
Define two convenient macros for read-ahead: - MAX_RA_PAGES: rounded down counterpart of VM_MAX_READAHEAD - MIN_RA_PAGES: rounded _up_ counterpart of VM_MIN_READAHEAD Note that the rounded up MIN_RA_PAGES will work flawlessly with _large_ page sizes like 64k. Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> Cc: Steven Pratt <slpratt@austin.ibm.com> Cc: Ram Pai <linuxram@us.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
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