We saw it as well (and fixed a bit differently, because of kpatch).
Here's the reproducer, triggers the bug within few seconds
for i in {0..3}; do
dd if=/dev/zero of=/dev/shm/$i bs=512M count=1
losetup /dev/loop$((4+i)) /dev/shm/$i
done
sleep 1
yes | mdadm -C /dev/md0 -l10 -n4 --assume-
On 7/14/20 9:18 AM, Song Liu wrote:
On Mon, Jul 13, 2020 at 11:41 PM Junxiao Bi wrote:
On 7/13/20 11:17 PM, Song Liu wrote:
On Thu, Jul 9, 2020 at 4:36 PM Junxiao Bi wrote:
The following deadlock was captured. The first process is holding 'kernfs_mutex'
and hung by io. The io was staging i
On Mon, Jul 13, 2020 at 11:41 PM Junxiao Bi wrote:
>
> On 7/13/20 11:17 PM, Song Liu wrote:
>
> > On Thu, Jul 9, 2020 at 4:36 PM Junxiao Bi wrote:
> >> The following deadlock was captured. The first process is holding
> >> 'kernfs_mutex'
> >> and hung by io. The io was staging in 'r1conf.pending
On 7/13/20 11:17 PM, Song Liu wrote:
On Thu, Jul 9, 2020 at 4:36 PM Junxiao Bi wrote:
The following deadlock was captured. The first process is holding 'kernfs_mutex'
and hung by io. The io was staging in 'r1conf.pending_bio_list' of raid1 device,
this pending bio list would be flushed by seco
On Thu, Jul 9, 2020 at 4:36 PM Junxiao Bi wrote:
>
> The following deadlock was captured. The first process is holding
> 'kernfs_mutex'
> and hung by io. The io was staging in 'r1conf.pending_bio_list' of raid1
> device,
> this pending bio list would be flushed by second process 'md127_raid1', b
Anybody help take a look at this deadlock?
Issue happened when raid_check was running, at that time, system memory
was not enough, one process which was doing path lookup from sysfs
triggered the direct memory reclaim, it was holding filesystem mutex
'kernelfs_mutex' and hung by io. The io wou
The following deadlock was captured. The first process is holding 'kernfs_mutex'
and hung by io. The io was staging in 'r1conf.pending_bio_list' of raid1 device,
this pending bio list would be flushed by second process 'md127_raid1', but
it was hung by 'kernfs_mutex'. Using sysfs_notify_dirent_safe
7 matches
Mail list logo
