Re: OOM problems on 2.6.12-rc1 with many fsx tests

["Martin J. Bligh" <mbligh@aracnet.com>]

>> > > I run into OOM problem again on 2.6.12-rc1. I run some(20) fsx tests on
>> > >  2.6.12-rc1 kernel(and 2.6.11-mm4) on ext3 filesystem, after about 10
>> > >  hours the system hit OOM, and OOM keep killing processes one by one. I
>> > >  could reproduce this problem very constantly on a 2 way PIII 700MHZ with
>> > >  512MB RAM. Also the problem could be reproduced on running the same test
>> > >  on reiser fs.
>> > > 
>> > >  The fsx command is:
>> > > 
>> > >  ./fsx -c 10 -n -r 4096 -w 4096 /mnt/test/foo1 &
>> > 
>> > 
>> > This ext3 bug goes all the way back to 2.6.6.
>> 
>> > I don't know yet why you saw problems with reiser3 and I'm pretty sure I
>> > saw problems with ext2.  More testing is needed there.
>> > 
>> 
>> We (Janet and I) are chasing this bug as well. Janet is able to
>> reproduce this bug on 2.6.9 but I can't. Glad to know you have nail down
>> this issue on ext3. I am pretty sure I saw this on Reiser3 once, I will
>> double check it.  Will try your patch today.
> 
> There's a second leak, with similar-looking symptoms.  At ~50
> commits/second it has leaked ~10MB in 24 hours, so it's very slow - less
> than a hundredth the rate of the first one.

What are you using to see these with, just kgdb, and a large cranial
capacity? Or is there some more magic?

m.