Re: [PATCH] fs-writeback: drop wb->list_lock during blk_finish_plug()

[Linus Torvalds]

On Wed, Sep 16, 2015 at 7:14 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
>>
>> Dave, if you're testing my current -git, the other performance issue
>> might still be the spinlock thing.
>
> I have the fix as the first commit in my local tree - it'll remain
> there until I get a conflict after an update. :)

Ok. I'm happy to report that you should get a conflict now, and that
the spinlock code should work well for your virtualized case again.

No updates on the plugging thing yet, I'll wait a bit and follow this
thread and see if somebody comes up with any explanations or theories
in the hope that we might not need to revert (or at least have a more
targeted change).

                Linus
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