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authorBart Samwel <bart@samwel.tk>2006-03-24 14:15:48 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-24 18:33:20 +0300
commitf6ef943813ac3085ece7252ea101d663581219f6 (patch)
treee32d3e57ba6ae235ec1f510b16d77fe9bfa8f96e /include/linux/writeback.h
parent36f574135e36b86bb6ae794bf1d0fce3efa5601f (diff)
downloadlinux-f6ef943813ac3085ece7252ea101d663581219f6.tar.xz
[PATCH] Represent dirty_*_centisecs as jiffies internally
Make that the internal values for: /proc/sys/vm/dirty_writeback_centisecs /proc/sys/vm/dirty_expire_centisecs are stored as jiffies instead of centiseconds. Let the sysctl interface do the conversions with full precision using clock_t_to_jiffies, instead of doing overflow-sensitive on-the-fly conversions every time the values are used. Cons: apparent precision loss if HZ is not a multiple of 100, because of conversion back and forth. This is a common problem for all sysctl values that use proc_dointvec_userhz_jiffies. (There is only one other in-tree use, in net/core/neighbour.c.) Signed-off-by: Bart Samwel <bart@samwel.tk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/writeback.h')
-rw-r--r--include/linux/writeback.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index beaef5c7a0ea..609565961494 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -88,8 +88,8 @@ void throttle_vm_writeout(void);
/* These are exported to sysctl. */
extern int dirty_background_ratio;
extern int vm_dirty_ratio;
-extern int dirty_writeback_centisecs;
-extern int dirty_expire_centisecs;
+extern int dirty_writeback_interval;
+extern int dirty_expire_interval;
extern int block_dump;
extern int laptop_mode;