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]
Kernrel version: Linux version 5.6.0
Frequency: every time
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/image
6.mkfs.ext2 /dev/loop6
Any comments will be appreciated.
Thanks,
Yanfei
