[BUG] ext3 + diskquta + sync = deadlock

[BUG] ext3 + diskquta + sync = deadlock

[Alex Lyashkov]

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Hello All

I tred to test stabilyty of ext3 filesystem with high load.

at one console do start/stop some programs.
at second console start script
===
while [ 1 ]; do
mount -o remount,usrquota,grpquota /
sleep 5
done;
===
for test how work fs sync.
After small time (less 10 min) i tred logon on third console and system been 
locked.
I use RH kernel 2.4.18-27.x on RH 7.3 box.
logs tasks states in deadlock attached in mail.


-- 
With best regards,
Alex

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Re: [BUG] ext3 + diskquta + sync = deadlock

[Jan Kara]

  Hi,

> I tred to test stabilyty of ext3 filesystem with high load.
> 
> at one console do start/stop some programs.
> at second console start script
> ===
> while [ 1 ]; do
> mount -o remount,usrquota,grpquota /
> sleep 5
> done;
> ===
> for test how work fs sync.
> After small time (less 10 min) i tred logon on third console and system been 
> locked.
> I use RH kernel 2.4.18-27.x on RH 7.3 box.
> logs tasks states in deadlock attached in mail.
  Hmm... We had some deadlock in 2.4.18 (and still have one nasty in
2.4.23) but from the traces this looks different. I'll try to reproduce it.

									Honza

-- 
Jan Kara <jack@suse.cz>
SuSE CR Labs

Re: [BUG] ext3 + diskquta + sync = deadlock

[Alex Lyashkov]

On Thursday 06 November 2003 17:59, you wrote:
>   Hi,
>
> > I tred to test stabilyty of ext3 filesystem with high load.
> >
> > at one console do start/stop some programs.
> > at second console start script
> > ===
> > while [ 1 ]; do
> > mount -o remount,usrquota,grpquota /
> > sleep 5
> > done;
> > ===
> > for test how work fs sync.
> > After small time (less 10 min) i tred logon on third console and system
> > been locked.
> > I use RH kernel 2.4.18-27.x on RH 7.3 box.
> > logs tasks states in deadlock attached in mail.
>
>   Hmm... We had some deadlock in 2.4.18 (and still have one nasty in
> 2.4.23) but from the traces this looks different. I'll try to reproduce it.
>
today i try to compile kernel with enabled JDB debug and set debug level to 
100.
logs be avabled at http://freevps.com/download/ext3_bug/
If need other info or help for fixing it bug - i ready for it.

-- 
With best regards,
Alex