linux-kernel - Re: [PATCH v2] FAT: use schedule_timeout_uninterruptible() instead of congestion

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Date:   Mon, 13 Dec 2021 13:49:07 +1100
From:   "NeilBrown" <neilb@...e.de>
To:     "OGAWA Hirofumi" <hirofumi@...l.parknet.co.jp>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        "Christoph Hellwig" <hch@...radead.org>
Subject: Re: [PATCH v2] FAT: use schedule_timeout_uninterruptible() instead of
 congestion_wait()

On Mon, 13 Dec 2021, OGAWA Hirofumi wrote:
> "NeilBrown" <neilb@...e.de> writes:
> 
> > On Sat, 11 Dec 2021, OGAWA Hirofumi wrote:
> >> "NeilBrown" <neilb@...e.de> writes:
> >> 
> >> > congestion_wait() in this context is just a sleep - block devices do not
> >> > in general support congestion signalling any more.
> >> >
> >> > The goal here is to wait for any recently written data to get to
> >> > storage.  blkdev_issue_flush() is thought to be too expensive, so
> >> > replace congestion_wait() with an explicit timeout.
> >> 
> >> If just replace, the following looks better
> >> 
> >> 	set_current_state(TASK_UNINTERRUPTIBLE);
> >> 	io_schedule_timeout(HZ/10);
> >> 
> >> Otherwise,
> >> 
> >> Acked-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
> >
> > Thanks.
> > According to MAINTAINERS, I should send patches for this code to you,
> > with the implication (I assumed) that you would forwarded them upstream
> > if acceptable.
> > But the fact that you have send mt an Acked-By seems to suggest that you
> > won't be doing that.
> > To whom should I send this patch with your acked-by?
> 
> Ah, sorry. I have no repository. So FAT patches goes to linus tree via
> akpm's help.
> 
> So "Cc: Andrew Morton <akpm@...ux-foundation.org>" and my Acked-by
> should work (or I will Cc as reply if need).

Will do, thanks.

NeilBrown