From: Jens Axboe <axboe@fb.com>
To: Stefan Haberland <sth@linux.vnet.ibm.com>,
keith.busch@intel.com, torvalds@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,
Sebastian Ott <sebott@linux.vnet.ibm.com>
Subject: Re: [BUG] Regression introduced with "block: split bios to max possible length"
Date: Thu, 21 Jan 2016 14:34:28 -0700 [thread overview]
Message-ID: <56A14EE4.1020008@fb.com> (raw)
In-Reply-To: <56A0F1CA.4010303@linux.vnet.ibm.com>
On 01/21/2016 07:57 AM, Stefan Haberland wrote:
> Hi,
>
> unfortunately commit e36f62042880 "block: split bios to maxpossible length"
> breaks the DASD driver on s390. We expect the block requests to be
> multiple
> of 4k in size. With the patch applied I see the requests split up in
> multiple
> of 512 byte and therefore the requests get rejected and lots of I/Os fail.
Sigh, that's definitely a bug. I'll take a look at it and see if I can
get a tested fix in for 4.5-rc1. If not, we'll revert it, again.
--
Jens Axboe
next prev parent reply other threads:[~2016-01-21 21:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-21 14:57 [BUG] Regression introduced with "block: split bios to max possible length" Stefan Haberland
2016-01-21 21:34 ` Jens Axboe [this message]
2016-01-21 22:51 ` Keith Busch
2016-01-22 1:12 ` Linus Torvalds
2016-01-22 3:21 ` Keith Busch
2016-01-22 4:15 ` Linus Torvalds
2016-01-22 14:56 ` Keith Busch
2016-01-22 17:15 ` Jens Axboe
2016-01-22 15:06 ` Ming Lei
2016-01-22 17:03 ` Linus Torvalds
2016-01-22 17:48 ` Ming Lei
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