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Re: [BUG] Regression introduced with "block: split bios to max possible length"

From Jens Axboe <axboe@fb.com>
Newsgroups linux.kernel
Subject Re: [BUG] Regression introduced with "block: split bios to max possible length"
Date 2016-01-21 22:40 +0100
Message-ID <qTv7t-2E4-29@gated-at.bofh.it> (permalink)
References <qToSl-6CC-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

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Thread

[BUG] Regression introduced with "block: split bios to max possible  length" Stefan Haberland <sth@linux.vnet.ibm.com> - 2016-01-21 16:00 +0100
  Re: [BUG] Regression introduced with "block: split bios to max  possible length" Jens Axboe <axboe@fb.com> - 2016-01-21 22:40 +0100
    Re: [BUG] Regression introduced with "block: split bios to max  possible length" Keith Busch <keith.busch@intel.com> - 2016-01-22 00:00 +0100
      Re: [BUG] Regression introduced with "block: split bios to max  possible length" Linus Torvalds <torvalds@linux-foundation.org> - 2016-01-22 02:20 +0100
        Re: [BUG] Regression introduced with "block: split bios to max  possible length" Keith Busch <keith.busch@intel.com> - 2016-01-22 04:30 +0100
          Re: [BUG] Regression introduced with "block: split bios to max  possible length" Linus Torvalds <torvalds@linux-foundation.org> - 2016-01-22 05:20 +0100
            Re: [BUG] Regression introduced with "block: split bios to max  possible length" Keith Busch <keith.busch@intel.com> - 2016-01-22 16:00 +0100
              Re: [BUG] Regression introduced with "block: split bios to max  possible length" Jens Axboe <axboe@fb.com> - 2016-01-22 18:20 +0100
            Re: [BUG] Regression introduced with "block: split bios to max  possible length" Ming Lei <tom.leiming@gmail.com> - 2016-01-22 16:10 +0100
              Re: [BUG] Regression introduced with "block: split bios to max  possible length" Linus Torvalds <torvalds@linux-foundation.org> - 2016-01-22 18:10 +0100
                Re: [BUG] Regression introduced with "block: split bios to max  possible length" Ming Lei <tom.leiming@gmail.com> - 2016-01-22 18:50 +0100

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