On 11.11.21 г. 22:57, Chris Murphy wrote: > On Thu, Nov 11, 2021 at 3:24 PM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: >> >> Soon after logging in and launching some apps, I get a hang. Although >> there's lots of btrfs stuff in the call traces, I think we're stuck in >> writeback so everything else just piles up and it all hangs >> indefinitely. >> >> Happening since at least >> 5.16.0-0.rc0.20211109gitd2f38a3c6507.9.fc36.x86_64 and is still happening with >> 5.16.0-0.rc0.20211111gitdebe436e77c7.11.fc36.x86_64 >> >> Full dmesg including sysrq+w when the journal becomes unresponsive and >> then a bunch of block tasks > 120s roll in on their own. >> >> https://bugzilla-attachments.redhat.com/attachment.cgi?id=1841283 > The btrfs traces in this one doesn't look interesting, what's interesting is you have a bunch of tasks, including btrfs transaction commit which are stuck waiting to get a tag from the underlying block device - blk_mq_get_tag function. This indicates something's going on with the underlying block device.
