[Linux-cluster] umount hang on 2.6.10 and latest GFS

[David Teigland]

On Thu, Jan 27, 2005 at 05:41:10PM -0800, Daniel McNeil wrote:

> dlm_astd      D 00000008     0 10264      6                3235 (L-TLB)
> dc9c3ee8 00000046 dc9c3ed8 00000008 00000002 00000800 00000008 c8cc35e0
>        f7bc0568 5f8a4c1c 0179a889 e4676c5a 00004b2d dc9c3f14 c051c000 c1716f60
>        00000001 000001b0 0167c50b 00005e6b e9db55e0 e9db574c c1714060 00000000
> Call Trace:
>  [<c03cef7c>] rwsem_down_read_failed+0x9c/0x190
>  [<f8aca119>] .text.lock.ast+0xc7/0x1de [dlm]
>  [<f8ac9ea5>] dlm_astd+0x1e5/0x210 [dlm]
>  [<c013245a>] kthread+0xba/0xc0
>  [<c0101315>] kernel_thread_helper+0x5/0x10
> 
> So, it looks like dlm_astd is stuck on a down_read().
> 
> The only down_read I see is in process_asts().
> 
> 	down_read(&ls->ls_in_recovery);

Yep, that's it.  The ls struct is freed while dlm_astd is blocked there.
I checked in a fix for this a few days ago.

-- 
Dave Teigland  <teigland at redhat.com>