Re: [PATCH 1/1] Add check for dirty_writeback_interval in bdi_wakeup_thread_delayed

Artem Bityutskiy
2011-04-18T12:30:07Z

On Mon, 2011-04-18 at 14:46 +0530, Raghavendra D Prabhu wrote:
> I have set it to 500 centisecs as that is the default value of
> dirty_writeback_interval. I used this logic for following reason: the
> purpose for which dirty_writeback_interval is set to 0 is to disable
> periodic writeback
> (http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/fs/fs-writeback.c#L818)
> , whereas here (in bdi_wakeup_thread_delayed) it is being used for a
> different purpose -- to delay the bdi wakeup in order to reduce context
> switches for dirty inode writeback.

But why it wakes up the bdi thread? Exactly to make sure the periodic
write-back happen.

--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)