diff options
| author | Bart Samwel <bart@samwel.tk> | 2006-03-24 03:15:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-24 07:33:20 -0800 |
| commit | ed5b43f15a8e86e3ae939b98bc161ee973ecedf2 (patch) | |
| tree | dcd5bc0b5817d6452b0897a08293317f470f4db9 | |
| parent | f6ef943813ac3085ece7252ea101d663581219f6 (diff) | |
| download | lwn-ed5b43f15a8e86e3ae939b98bc161ee973ecedf2.tar.gz lwn-ed5b43f15a8e86e3ae939b98bc161ee973ecedf2.zip | |
[PATCH] Represent laptop_mode as jiffies internally
Make that the internal value for /proc/sys/vm/laptop_mode is stored as
jiffies instead of seconds. Let the sysctl interface do the conversions,
instead of doing on-the-fly conversions every time the value is used.
Add a description of the fact that laptop_mode doubles as a flag and a
timeout to the comment above the laptop_mode variable.
Signed-off-by: Bart Samwel <bart@samwel.tk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | kernel/sysctl.c | 5 | ||||
| -rw-r--r-- | mm/page-writeback.c | 5 |
2 files changed, 5 insertions, 5 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 817ba25517eb..d13426680d10 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -848,9 +848,8 @@ static ctl_table vm_table[] = { .data = &laptop_mode, .maxlen = sizeof(laptop_mode), .mode = 0644, - .proc_handler = &proc_dointvec, - .strategy = &sysctl_intvec, - .extra1 = &zero, + .proc_handler = &proc_dointvec_jiffies, + .strategy = &sysctl_jiffies, }, { .ctl_name = VM_BLOCK_DUMP, diff --git a/mm/page-writeback.c b/mm/page-writeback.c index e79107991d20..c1052ee79f01 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -88,7 +88,8 @@ int dirty_expire_interval = 30 * HZ; int block_dump; /* - * Flag that puts the machine in "laptop mode". + * Flag that puts the machine in "laptop mode". Doubles as a timeout in jiffies: + * a full sync is triggered after this time elapses without any disk activity. */ int laptop_mode; @@ -468,7 +469,7 @@ static void laptop_timer_fn(unsigned long unused) */ void laptop_io_completion(void) { - mod_timer(&laptop_mode_wb_timer, jiffies + laptop_mode * HZ); + mod_timer(&laptop_mode_wb_timer, jiffies + laptop_mode); } /* |