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From: Jens Axboe <axboe@kernel.dk>
To: "Xu, Yanfei" <yanfei.xu@windriver.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-block@vger.kernel.org,
	"Darrick J. Wong" <darrick.wong@oracle.com>
Subject: Re: BUG:loop:blk_update_request: I/O error, dev loop6, sector 49674 op 0x9:(WRITE_ZEROES)
Date: Tue, 12 May 2020 20:22:08 -0600	[thread overview]
Message-ID: <8f3eeb22-2e85-aa3f-6287-b3c467d39a8e@kernel.dk> (raw)
In-Reply-To: <c51460e0-1abb-799d-9ee9-de9c39315eda@windriver.com>

On 5/12/20 8:14 PM, Xu, Yanfei wrote:
> Hi,
> 
> After operating the /dev/loop which losetup with an image placed in**tmpfs,
> 
> I got the following ERROR messages:
> 
> ----------------[cut here]---------------------
> 
> [  183.110770] blk_update_request: I/O error, dev loop6, sector 524160 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.123949] blk_update_request: I/O error, dev loop6, sector 522 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.137123] blk_update_request: I/O error, dev loop6, sector 16906 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.150314] blk_update_request: I/O error, dev loop6, sector 32774 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.163551] blk_update_request: I/O error, dev loop6, sector 49674 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.176824] blk_update_request: I/O error, dev loop6, sector 65542 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.190029] blk_update_request: I/O error, dev loop6, sector 82442 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.203281] blk_update_request: I/O error, dev loop6, sector 98310 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.216531] blk_update_request: I/O error, dev loop6, sector 115210 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> [  183.229914] blk_update_request: I/O error, dev loop6, sector 131078 op 0x9:(WRITE_ZEROES) flags 0x1000800 phys_seg 0 prio class 0
> 
> 
> I have found the commit which introduce this issue by git bisect :
> 
>     commit :efcfec57[loop: fix no-unmap write-zeroes request behavior]

Please CC the author of that commit too. Leaving the rest quoted below.

> Kernrel version: Linux version 5.6.0
> 
> Frequency: everytime
> 
> steps to reproduce:
> 
>   1.git clone mainline kernel
> 
>   2.compile kernel with ARCH=x86_64, and then boot the system with it
> 
>     (seems other arch also can reproduce it )
> 
>   3.make an image by "dd of=/tmp/image if=/dev/zero bs=1M count=256"
> 
>   *4.**place the image in tmpfs directory*
> 
>   5.losetup /dev/loop6 /PATH/TO/image
> 
>   6.mkfs.ext2 /dev/loop6
> 
> 
> Any comments will be appreciated.
> 
> 
> Thanks,
> 
> Yanfei
> 
> 
> 
> 
> 


-- 
Jens Axboe


       reply	other threads:[~2020-05-13  2:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <dac81506-0065-ee64-fcd1-c9f1d002b4fb@windriver.com>
     [not found] ` <c51460e0-1abb-799d-9ee9-de9c39315eda@windriver.com>
2020-05-13  2:22   ` Jens Axboe [this message]
2020-05-13 16:41     ` BUG:loop:blk_update_request: I/O error, dev loop6, sector 49674 op 0x9:(WRITE_ZEROES) Darrick J. Wong
2020-05-14 16:10       ` Xu, Yanfei
2020-05-13 13:10 Xu, Yanfei

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