Messages in this thread | | | Date | Sun, 28 Feb 2016 18:53:33 -0700 | From | Andrea Righi <> | Subject | multipath: I/O hanging forever |
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Hello,
if I try to do I/O on a mdadm/multipath volume the task is hunging forever and it never completes.
Anybody else has noticed the same problem?
I'm using 4.5.0-rc5+, from Linus' git. I'll try to do a git bisect later, I'm pretty sure this problem has been introduced recently (i.e., I've never seen this issue with 4.1.x).
Example:
# mdadm -C /dev/md0 --level=multipath --raid-devices=2 /dev/sdb /dev/sdc # cat /proc/mdstat Personalities : [multipath] md0 : active multipath sdb[0] sdc[1] 4042740 blocks super 1.2 [2/2] [UU] # mkfs.xfs /dev/md0 meta-data=/dev/md0 isize=256 agcount=4, agsize=252672 blks = sectsz=512 attr=2, projid32bit=0 data = bsize=4096 blocks=1010685, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 ^C^C^C
# cat /proc/`pidof mkfs.xfs`/stack [<ffffffff8126f53c>] do_blockdev_direct_IO+0x1adc/0x2300 [<ffffffff8126fda3>] __blockdev_direct_IO+0x43/0x50 [<ffffffff8126accc>] blkdev_direct_IO+0x4c/0x50 [<ffffffff811a2014>] generic_file_direct_write+0xa4/0x160 [<ffffffff811a2190>] __generic_file_write_iter+0xc0/0x1e0 [<ffffffff8126afc0>] blkdev_write_iter+0x80/0x100 [<ffffffff81228c3d>] __vfs_write+0xad/0xe0 [<ffffffff81229a85>] vfs_write+0xa5/0x1a0 [<ffffffff8122aacc>] SyS_pwrite64+0x6c/0xa0 [<ffffffff818281f2>] entry_SYSCALL_64_fastpath+0x12/0x76 [<ffffffffffffffff>] 0xffffffffffffffff
Thanks, -Andrea
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