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SubjectRe: [ANNOUNCE] Reiserfs/kill-bkl tree v2

* Chris Mason <chris.mason@oracle.com> wrote:

> Definitely, the cost of the rare bug is much higher. The good
> news is that reiserfs tends to pile its races into a few spots.
> Most of them can be found with a 12 hour run of the namesys
> stress.sh program and a lot of memory pressure. I'd compile with
> preemption on and you'll have a good test on any SMP machine.
>
> http://oss.oracle.com/~mason/stress.sh
>
> stress.sh just copies a source directory into the test filesystem,
> then reads it back and deletes it in a loop. I'd run with 50
> procs and enough memory pressure for the box to lightly swap
> (booting w/mem= is a fine way to make memory pressure). This way
> you make sure to hammer on the metadata writeback paths, which is
> where all of the difficult races come in.
>
> Testing with an fsx-linux process running at the same time will
> make sure all of the mmap/truncate paths are working correctly as
> well.

Ok, that definitely looks like something feasible to run for
Frederic too, thanks for the detailed suggestion!

Ingo


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