On Wed, 26 Jun 2019 at 18:19, Sebastian Andrzej Siewior
[off-list ref] wrote:

Dear RT folks!

I'm pleased to announce the v5.0.21-rt14 patch set.

Changes since v5.0.21-rt13:

  - Fix a "scheduling while atomic" in zswap. Patch by Luis Claudio R.
    Goncalves.

  - Replace a fix for for wait_for_completion() (introduced in
    v5.0.14-rt9) by an alternative version as suggested by Peter
    Zijlstra.

  - Major futex/rtmutex surgery. He Zhe reported that glibc's
    tst-robustpi8.c triggers a BUG() statement. To address that bug the
    hash bucket has been made a raw_spinlock_t.

  - Two x86 FPU patches from upstream to avoid fallout on 32bit and with
    CRIU.

Known issues
     - rcutorture is currently broken on -RT. Reported by Juri Lelli.

This does not boot for me, using the same kernel config as for
5.0.21-rt13, which works as normal.

At boot it seems to hang for a while, before throwing an error, so
this seems to be a timeout problem of some sort.

I don't know if this helps:

Call Trace:
 d_alloc_parallel+0x1c9/0x410
 __lookup_slow+0x66/0x150
 lookup_slow+0x31/0x50
 walk_component+0x1bf/0x340
 link_path_walk.part.0+0x2c1/0x540
 path_openat+0xa4/0x1590
 do_filp_open+0x8c/0x100
 ? _cond_resched+0x10/0x20
 ? _kmalloc_track_caller+0x167/0x200
 do_open_execat+0x76/0x190
 __do_execve_file.isra.0+0x6ad/0x890
 ? kmemdup+0x20/0x30
 ? umh_complete+0x30/0x30
 do_execve+0x1c/0x20
 call_usermodehelper_exec_async+0x17b/0x1a0
 ret_from_fork+0x35/0x40

Regards,
Arve