Re: generic rwsem [Re: Alpha "process table hang"]

[Bob McElrath <mcelrath+linux@draal.physics.wisc.edu>]

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Bob McElrath [mcelrath+linux@draal.physics.wisc.edu] wrote:
> Andrea Arcangeli [andrea@suse.de] wrote:
> >
> > So please try to reproduce the hang with 2.4.4pre3 with those two
> > patches applied:
> > 
> > 	ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.4pre3aa3/00_alpha-numa-3
> > 	ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.4pre3aa3/00_rwsem-generic-1
> > 
> > All alpha users should run with at least the above two patches applied
> > to compile their tree and to make sure to have rock solid rwsemaphores.
> 
> Excellent!  I'll give it a try.
> 
> Note that I recently saw the X hang with the 2.2.19 kernel, but I still
> haven't seen the process-table-hang with 2.2.19 (about 4 days running
> with 2.2.19).  It is *far* easier to get the X hang in 2.4 than 2.2.
> (minutes for 2.4, days for 2.2)  Also note that this is not an SMP
> machine (single processor 21164a, LX164 mobo).
> 
> But I'll apply your patch tonight and let you know the results.

Status report:
I'm at 2 days uptime now, and have not seen the process-table-hang.
Looks like this fixed it.  Previously I would get a hang in the first
day or so.  I'm using your alpha-numa-3 and rwsem-generic-4 against
2.4.4pre3.

Cheers,
-- Bob

Bob McElrath (rsmcelrath@students.wisc.edu) 
Univ. of Wisconsin at Madison, Department of Physics

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