* bcache writeback hang with 3.11.5 and 3.10.17
@ 2013-10-20 13:42 Pavel Palát
[not found] ` <5263DDC9.6050705-UDV0GzaorVTrBKCeMvbIDA@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Pavel Palát @ 2013-10-20 13:42 UTC (permalink / raw)
To: linux-bcache-u79uwXL29TY76Z2rM5mHXA
Hello,
I have experienced hangs with above kernel and bcache in writeback mode.
Hangs are very easily archieved - just do:
mkdir /data/tmp
cp -xar / /data/tmp
Cancel after 1-5 minutes, then do sync (sometimes don't needed) and it
hangs. Either the sync hangs and/or the cp (or rm /data/tmp). Behaviour
is very consistent, it happens every time I enable writeback and perform
IO heavy operations.
I have not experienced the issue so far with writethrough mode.
Hardware is HP j000ec, attaching dmesg from hanged box with both 3.11.5
and 3.10.17 LTS kernel. Distribution is arch linux.
dmesg outputs is available on
http://www.devsoft.cz/upload/bcache_bugreport.tar.gz
P.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: bcache writeback hang with 3.11.5 and 3.10.17
[not found] ` <5263DDC9.6050705-UDV0GzaorVTrBKCeMvbIDA@public.gmane.org>
@ 2013-10-25 9:00 ` Pavel Palát
0 siblings, 0 replies; 2+ messages in thread
From: Pavel Palát @ 2013-10-25 9:00 UTC (permalink / raw)
To: linux-bcache-u79uwXL29TY76Z2rM5mHXA
On 20.10.2013 15:42, Pavel Palát wrote:
> Hello,
>
> I have experienced hangs with above kernel and bcache in writeback
> mode. Hangs are very easily archieved - just do:
>
> mkdir /data/tmp
> cp -xar / /data/tmp
>
> Cancel after 1-5 minutes, then do sync (sometimes don't needed) and it
> hangs. Either the sync hangs and/or the cp (or rm /data/tmp).
> Behaviour is very consistent, it happens every time I enable writeback
> and perform IO heavy operations.
>
> I have not experienced the issue so far with writethrough mode.
>
> Hardware is HP j000ec, attaching dmesg from hanged box with both
> 3.11.5 and 3.10.17 LTS kernel. Distribution is arch linux.
>
> dmesg outputs is available on
> http://www.devsoft.cz/upload/bcache_bugreport.tar.gz
>
> P.
Hello,
update: Tried with 3.12rc6 with same results. It also hangs with writeback.
http://www.devsoft.cz/upload/bcache_312.txt
Best regards,
Pavel Palat
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2013-10-20 13:42 bcache writeback hang with 3.11.5 and 3.10.17 Pavel Palát
[not found] ` <5263DDC9.6050705-UDV0GzaorVTrBKCeMvbIDA@public.gmane.org>
2013-10-25 9:00 ` Pavel Palát
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