It would be real nice if the ubuntu livecd iso for usb booting could
also get the fixed kernel.
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https://bugs.launchpad.net/bugs/1906476
Title:
PANIC at zfs_znode.c:335:zfs_znode_sa_init() // VERIFY(0 ==
sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED,
>z_sa_hdl)) failed
Status in Native ZFS for Linux:
New
Status in linux package in Ubuntu:
Invalid
Status in linux-raspi package in Ubuntu:
Confirmed
Status in ubuntu-release-upgrader package in Ubuntu:
Confirmed
Status in zfs-linux package in Ubuntu:
Fix Released
Status in linux source package in Impish:
Fix Released
Status in linux-raspi source package in Impish:
Fix Released
Status in ubuntu-release-upgrader source package in Impish:
Confirmed
Status in zfs-linux source package in Impish:
Fix Released
Bug description:
Since today while running Ubuntu 21.04 Hirsute I started getting a ZFS
panic in the kernel log which was also hanging Disk I/O for all
Chrome/Electron Apps.
I have narrowed down a few important notes:
- It does not happen with module version 0.8.4-1ubuntu11 built and included
with 5.8.0-29-generic
- It was happening when using zfs-dkms 0.8.4-1ubuntu16 built with DKMS
on the same kernel and also on 5.8.18-acso (a custom kernel).
- For whatever reason multiple Chrome/Electron apps were affected,
specifically Discord, Chrome and Mattermost. In all cases they seem
(but I was unable to strace the processes so it was a bit hard ot
confirm 100% but by deduction from /proc/PID/fd and the hanging ls)
they seem hung trying to open files in their 'Cache' directory, e.g.
~/.cache/google-chrome/Default/Cache and ~/.config/Mattermost/Cache ..
while the issue was going on I could not list that directory either
"ls" would just hang.
- Once I removed zfs-dkms only to revert to the kernel built-in
version it immediately worked without changing anything, removing
files, etc.
- It happened over multiple reboots and kernels every time, all my
Chrome apps weren't working but for whatever reason nothing else
seemed affected.
- It would log a series of spl_panic dumps into kern.log that look like this:
Dec 2 12:36:42 optane kernel: [ 72.857033] VERIFY(0 ==
sa_handle_get_from_db(zfsvfs->z_os, db, zp, SA_HDL_SHARED, >z_sa_hdl))
failed
Dec 2 12:36:42 optane kernel: [ 72.857036] PANIC at
zfs_znode.c:335:zfs_znode_sa_init()
I could only find one other google reference to this issue, with 2 other
users reporting the same error but on 20.04 here:
https://github.com/openzfs/zfs/issues/10971
- I was not experiencing the issue on 0.8.4-1ubuntu14 and fairly sure
it was working on 0.8.4-1ubuntu15 but broken after upgrade to
0.8.4-1ubuntu16. I will reinstall those zfs-dkms versions to verify
that.
There were a few originating call stacks but the first one I hit was
Call Trace:
dump_stack+0x74/0x95
spl_dumpstack+0x29/0x2b [spl]
spl_panic+0xd4/0xfc [spl]
? sa_cache_constructor+0x27/0x50 [zfs]
? _cond_resched+0x19/0x40
? mutex_lock+0x12/0x40
? dmu_buf_set_user_ie+0x54/0x80 [zfs]
zfs_znode_sa_init+0xe0/0xf0 [zfs]
zfs_znode_alloc+0x101/0x700 [zfs]
? arc_buf_fill+0x270/0xd30 [zfs]
? __cv_init+0x42/0x60 [spl]
? dnode_cons+0x28f/0x2a0 [zfs]
? _cond_resched+0x19/0x40
? _cond_resched+0x19/0x40
? mutex_lock+0x12/0x40
? aggsum_add+0x153/0x170 [zfs]
? spl_kmem_alloc_impl+0xd8/0x110 [spl]
? arc_space_consume+0x54/0xe0 [zfs]
? dbuf_read+0x4a0/0xb50 [zfs]
? _cond_resched+0x19/0x40
? mutex_lock+0x12/0x40
? dnode_rele_and_unlock+0x5a/0xc0 [zfs]
? _cond_resched+0x19/0x40
? mutex_lock+0x12/0x40
? dmu_object_info_from_dnode+0x84/0xb0 [zfs]
zfs_zget+0x1c3/0x270 [zfs]
? dmu_buf_rele+0x3a/0x40 [zfs]
zfs_dirent_lock+0x349/0x680 [zfs]
zfs_dirlook+0x90/0x2a0 [zfs]
? zfs_zaccess+0x10c/0x480 [zfs]
zfs_lookup+0x202/0x3b0 [zfs]
zpl_lookup+0xca/0x1e0 [zfs]
path_openat+0x6a2/0xfe0
do_filp_open+0x9b/0x110
? __check_object_size+0xdb/0x1b0
? __alloc_fd+0x46/0x170
do_sys_openat2+0x217/0x2d0
? do_sys_openat2+0x217/0x2d0
do_sys_open+0x59/0x80
__x64_sys_openat+0x20/0x30
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