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Make writes to md/safe_mode_delay immediately effective. 

If we reduce the 'safe_mode_delay', it could still wait for the old
delay to completely expire before doing anything about safe_mode.
Thus the effect if the change is delayed.

To make the effect more immediate, run the timeout function
immediately if the delay was reduced.  This may cause it to run
slightly earlier that required, but that is the safer option.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2008-08-05 15:54:13 +10:00
parent 2b12a4c524
commit 19052c0e85
1 changed files with 5 additions and 0 deletions
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5
drivers/md/md.c
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@ -2393,6 +2393,8 @@ static void analyze_sbs(mddev_t * mddev)
}
static void md_safemode_timeout(unsigned long data);
static ssize_t
safe_delay_show(mddev_t *mddev, char *page)
{
@ -2432,9 +2434,12 @@ safe_delay_store(mddev_t *mddev, const char *cbuf, size_t len)
if (msec == 0)
mddev->safemode_delay = 0;
else {
unsigned long old_delay = mddev->safemode_delay;
mddev->safemode_delay = (msec*HZ)/1000;
if (mddev->safemode_delay == 0)
mddev->safemode_delay = 1;
if (mddev->safemode_delay < old_delay)
md_safemode_timeout((unsigned long)mddev);
}
return len;
}