linux-kernel - Re: [PATCH] bcache: bch_writeback

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Message-ID: <alpine.LRH.2.11.1605101812240.22680@mx.ewheeler.net>
Date:	Tue, 10 May 2016 18:13:02 -0700 (PDT)
From:	Eric Wheeler <bcache@...ts.ewheeler.net>
To:	Jiri Kosina <jikos@...nel.org>
cc:	Kent Overstreet <kent.overstreet@...il.com>,
	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	Maciej Piechotka <uzytkownik2@...il.com>
Subject: Re: [PATCH] bcache: bch_writeback_thread() is not freezable

On Mon, 2 May 2016, Jiri Kosina wrote:
> On Tue, 19 Apr 2016, Jiri Kosina wrote:
> 
> > From: Jiri Kosina <jkosina@...e.cz>
> > 
> > bch_writeback_thread() is calling try_to_freeze(), but that's just an 
> > expensive no-op given the fact that the thread is not marked freezable.
> > 
> > I/O helper kthreads, exactly such as the bcache writeback thread, actually 
> > shouldn't be freezable, because they are potentially necessary for 
> > finalizing the image write-out.
> > 
> > Signed-off-by: Jiri Kosina <jkosina@...e.cz>
> 
> Let's send a friendly ping on these three patches after two weeks...

Maciej,

Were you able to get a backtrace?


--
Eric Wheeler


> 
> -- 
> Jiri Kosina
> SUSE Labs
> 
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