linux-kernel - Re: [Linux-v3.19-9526-ga135c717d5cd + vfs.git] blk_update

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Message-ID: <F99FA56D-22CB-4E3F-ADED-181A4871C922@fb.com>
Date:	Sun, 22 Feb 2015 20:04:11 +0000
From:	Jens Axboe <axboe@...com>
To:	"<sedat.dilek@...il.com>" <sedat.dilek@...il.com>
CC:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Ming Lei <ming.lei@...onical.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [Linux-v3.19-9526-ga135c717d5cd + vfs.git] blk_update_request:
 I/O error, dev loop0

On Feb 22, 2015, at 12:02 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
> 
>> On Sun, Feb 22, 2015 at 5:06 PM, Jens Axboe <axboe@...com> wrote:
>>> On 02/22/2015 06:09 AM, Sedat Dilek wrote:
>>> 
>>> Hi,
>>> 
>>> when testing Linux-next (upcoming v3.20) I fell over similiar messages
>>> when running fio here.
>>> 
>>> This commit helped which is now upstream [1]...
>>> 
>>> commit 9f9ee1f2b2f94f19437ae2def7c0d6636d7fe02e
>>> "block: Quiesce zeroout wrapper"
>>> 
>>> --- dmesg_3.19.0-9526.2-iniza-small_before-fio-2.2.5.txt
>>> 2015-02-22 14:09:35.411824880 +0100
>>> +++ dmesg_3.19.0-9526.2-iniza-small_after-fio-2.2.5.txt 2015-02-22
>>> 14:10:25.327824500 +0100
>>> @@ -853,3 +853,25 @@
>>>  [  428.226000] Adding 36k swap on swapfile29.  Priority:-29 extents:1
>>> across:36k FS
>>>  [  469.339645] Process 7691(waitpid02) has RLIMIT_CORE set to 1
>>>  [  469.339650] Aborting core
>>> +[ 1877.189057] fio-testcase.sh (10238): drop_caches: 3
>>> +[ 1882.250174] blk_update_request: I/O error, dev loop0, sector 2883712
>>> +[ 1882.807993] blk_update_request: I/O error, dev loop0, sector 32460632
>>> +[ 1884.655458] blk_update_request: I/O error, dev loop0, sector 16869712
>>> +[ 1884.656896] blk_update_request: I/O error, dev loop0, sector 16854368
>>> +[ 1884.659316] blk_update_request: I/O error, dev loop0, sector 16855008
>>> +[ 1884.660834] blk_update_request: I/O error, dev loop0, sector 16869792
>>> +[ 1884.661780] blk_update_request: I/O error, dev loop0, sector 16854848
>>> +[ 1884.663282] blk_update_request: I/O error, dev loop0, sector 16855432
>>> +[ 1884.664775] blk_update_request: I/O error, dev loop0, sector 16859808
>>> +[ 1884.671472] blk_update_request: I/O error, dev loop0, sector 16866400
>>> +[ 1892.239383] blk_update_request: 20 callbacks suppressed
>>> +[ 1892.239389] blk_update_request: I/O error, dev loop0, sector 7872768
>>> +[ 1897.221576] blk_update_request: I/O error, dev loop0, sector 23331008
>>> +[ 1898.299271] blk_update_request: I/O error, dev loop0, sector 25690688
>>> +[ 1898.444161] blk_update_request: I/O error, dev loop0, sector 25726496
>>> +[ 1898.445946] blk_update_request: I/O error, dev loop0, sector 25690832
>>> +[ 1898.448185] blk_update_request: I/O error, dev loop0, sector 25692312
>>> +[ 1898.449321] blk_update_request: I/O error, dev loop0, sector 25704840
>>> +[ 1898.450314] blk_update_request: I/O error, dev loop0, sector 25710392
>>> +[ 1898.451351] blk_update_request: I/O error, dev loop0, sector 25726080
>>> +[ 1898.452348] blk_update_request: I/O error, dev loop0, sector 25737608
>>> 
>>> FYI: This is with Linux-v3.19-9526-ga135c717d5cd plus vfs.git#for-linus.
>> 
>> 
>> This really has nothing to do with commit 9f9ee1f2b2f, other than that they
>> both have some block related messages. The above is normal IO errors on the
>> device, we expect to see messages related to that. The question is mostly
>> why you are seeing those. What are you running on the device?
>> 
>> And is this a regression since 3.19?
> 
> OK, I mixed it up - I was on a hurry travelling back home.
> 
> This is (still) a Ubuntu/precise AMD64 WUBI system where I did the
> block-loopmq testing.
> 
> It seems to be a regression since 3.19 (see my attached tarball).

All I get is an attached file for a checksum, doesn't really help me in any way. 

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