linux-kernel - Re: IO errors after "block: remove bio_get_nr

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Message-ID: <20151220181801.GA12402@lst.de>
Date:	Sun, 20 Dec 2015 19:18:01 +0100
From:	Christoph Hellwig <hch@....de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Kent Overstreet <kent.overstreet@...il.com>,
	Ming Lin <ming.l@....samsung.com>, Jens Axboe <axboe@...com>,
	"Artem S. Tashkinov" <t.artem@...lcity.com>,
	Steven Whitehouse <swhiteho@...hat.com>,
	Tejun Heo <tj@...nel.org>, IDE-ML <linux-ide@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: IO errors after "block: remove bio_get_nr_vecs()"

On Sun, Dec 20, 2015 at 09:51:14AM -0800, Linus Torvalds wrote:
> Kent, Jens, Christoph et al,
>  please see this bugzilla:
> 
>   https://bugzilla.kernel.org/show_bug.cgi?id=109661
> 
> where Artem Tashkinov bisected his problems with 4.3 down to commit
> b54ffb73cadc ("block: remove bio_get_nr_vecs()") that you've all
> signed off on.

Artem,

can you re-check the commits around this series again?  I would be
extremtly surprised if it's really this particular commit and not
one just before it causing the problem - it just allocates bios
to the biggest possible instead of only allocating up to what
bio_add_page would accept.
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