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

[Linus Torvalds]

On Fri, Sep 11, 2015 at 4:36 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> Are we really ok with waiting synchronously for an inode while holding
> the plug? No chance of deadlock (waiting for IO that we've plugged)?
> That issue is true even of the current code, though, and I have _not_
> really thought that through, it's just a worry.

Never mind. We still flush the plug on explicit scheduling events.  I
wonder why I thought we got rid of that. Some kind of "senior moment",
I guess.

            Linus
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