Re: [PATCH 8/8] vm: Add an tuning knob for vm.max_writeback_mb
From: Jens Axboe
Date: Wed Sep 09 2009 - 08:44:56 EST
On Wed, Sep 09 2009, Christoph Hellwig wrote:
>
On Wed, Sep 09, 2009 at 02:37:46PM +0200, Jens Axboe wrote:
>
> They are there, have been for months! But I think Christoph is a little
>
> confused, we'll still do writeback inline from balance_dirty_pages(). It
>
> does writeback_inodes_wbc(), which does not schedule async writeout.
>
>
Hmm, at least the version I have applied right now calls
>
bdi_start_writeback and not writeback_inodes_wbc from
>
balance_dirty_pages. But you sent our another spin or two afer those,
>
so maybe it changed again.
Yes, that's the very end check, the old code does the same. Further up
it does writeback_inodes_wbc() if we are over the threshold.
--
Jens Axboe
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