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UBIFS: set write-buffer timout to 3-5 seconds 

This patch cleans up write-buffer timeout initialization and
sets it to 3-5 interval.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2009-06-23 20:26:33 +03:00
parent 0b335b9d7d
commit 2a35a3a8ab
2 changed files with 7 additions and 15 deletions
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17
fs/ubifs/io.c
View File

@ -828,7 +828,6 @@ out:
int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
{
size_t size;
ktime_t hardlimit;
wbuf->buf = kmalloc(c->min_io_size, GFP_KERNEL);
if (!wbuf->buf)
@ -854,18 +853,10 @@ int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
hrtimer_init(&wbuf->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
wbuf->timer.function = wbuf_timer_callback_nolock;
/*
* Make write-buffer soft limit to be 20% of the hard limit. The
* write-buffer timer is allowed to expire any time between the soft
* and hard limits.
*/
hardlimit = ktime_set(DEFAULT_WBUF_TIMEOUT_SECS, 0);
wbuf->delta = DEFAULT_WBUF_TIMEOUT_SECS * 1000000000ULL * 2 / 10;
if (wbuf->delta > ULONG_MAX)
wbuf->delta = ULONG_MAX;
wbuf->softlimit = ktime_sub_ns(hardlimit, wbuf->delta);
hrtimer_set_expires_range_ns(&wbuf->timer, wbuf->softlimit,
wbuf->delta);
wbuf->softlimit = ktime_set(WBUF_TIMEOUT_SOFTLIMIT, 0);
wbuf->delta = WBUF_TIMEOUT_HARDLIMIT - WBUF_TIMEOUT_SOFTLIMIT;
wbuf->delta *= 1000000000ULL;
ubifs_assert(wbuf->delta <= ULONG_MAX);
return 0;
}

5
fs/ubifs/ubifs.h
View File

@ -95,8 +95,9 @@
*/
#define BGT_NAME_PATTERN "ubifs_bgt%d_%d"
/* Default write-buffer synchronization timeout in seconds */
#define DEFAULT_WBUF_TIMEOUT_SECS 5
/* Write-buffer synchronization timeout interval in seconds */
#define WBUF_TIMEOUT_SOFTLIMIT 3
#define WBUF_TIMEOUT_HARDLIMIT 5
/* Maximum possible inode number (only 32-bit inodes are supported now) */
#define MAX_INUM 0xFFFFFFFF