Re: possible releng13 deadlock ?

From: Alan Somers <asomers_at_freebsd.org>
Date: Tue, 22 Jun 2021 12:14:20 -0600
If you think there's a deadlock, please send the kernel stacks of the zfs
send and recv processes.  You can get those with "procstat -kk <PID>".

On Tue, Jun 22, 2021 at 11:49 AM mike tancsa <mike_at_sentex.net> wrote:

> I was trying out a zfs send | recv on a new controller this morning
> using the latest RELENG_13 upto the last commit there
> (25302a721f69d34c72d8bd3e0c316ad12647e281) and experienced a hard lock
> on the system.  The motherboard is just a desktop board, so no serial
> hooked up nor ipmi.  However, reverting to a kernel from the 20th
> (stable/13-659f77766) seems to be OK.  Note, this was one try deadlock
> so cant be sure if it was a fluke and the issue is from some time else.
>
> But I will try and repeat a few sends (approx 20min) with the working
> kernel and then try again with the latest kernel.  Anyone else using the
> latest 13 stable and ZFS from today notice anything ?
>
> I am just sending a zfs dataset from one set of striped disks to
> another.  On the plus side, its FAST!
>
>  zpool iostat testmdt 1
>               capacity     operations     bandwidth
> pool        alloc   free   read  write   read  write
> ----------  -----  -----  -----  -----  -----  -----
> testmdt     1.31T  1.41T      1  4.78K  6.62K   602M
> testmdt     1.31T  1.40T      0  6.51K      0   819M
> testmdt     1.31T  1.40T      0  6.52K      0   820M
> testmdt     1.32T  1.40T      0  6.52K      0   820M
> testmdt     1.32T  1.40T      0  6.51K      0   819M
> testmdt     1.32T  1.40T      0  8.22K      0  1.02G
> testmdt     1.32T  1.40T      0  4.98K      0   622M
> testmdt     1.32T  1.40T      0  8.58K      0  1.06G
> testmdt     1.32T  1.40T      0  9.18K      0  1.13G
> testmdt     1.32T  1.40T      0  1.44K      0   172M
> testmdt     1.32T  1.40T      0  1.19K      0   153M
> testmdt     1.32T  1.40T      0  5.21K      0   653M
> testmdt     1.32T  1.40T      0  4.09K      0   524M
> testmdt     1.32T  1.40T      0  8.72K      0  1.06G
> testmdt     1.32T  1.40T      0  2.51K      0   321M
> testmdt     1.32T  1.39T      0  10.5K      0  1.29G
> testmdt     1.32T  1.39T      0  6.42K      0   808M
>
>
>
>
Received on Tue Jun 22 2021 - 18:14:20 UTC

Original text of this message