From: Andrea Arcangeli <andrea@suse.de>
To: Bob McElrath <rsmcelrath@students.wisc.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: it isn't aa's rwsem-generic-6 bug but something else [Re: aa's rwsem-generic-6 bug? Process stuck in 'R' state.]
Date: Thu, 26 Apr 2001 17:45:53 +0200 [thread overview]
Message-ID: <20010426174553.B819@athlon.random> (raw)
In-Reply-To: <20010425223939.A26763@draal.physics.wisc.edu> <20010426061110.A819@athlon.random> <20010426003802.A738@draal.physics.wisc.edu>
In-Reply-To: <20010426003802.A738@draal.physics.wisc.edu>; from rsmcelrath@students.wisc.edu on Thu, Apr 26, 2001 at 12:38:02AM -0500
On Thu, Apr 26, 2001 at 12:38:02AM -0500, Bob McElrath wrote:
> When I posted this bug originally, you came right out and said it was
> probably the rwsemaphores. I really have no idea how the rwsemaphores
You were talking about the ps table hang when I told you about the rwsem
races. I had the same trouble on my alpha and I reproduced the races
trivially by lanucing:
make MAKE='make -j2' -j2 &
while :; do ps xa ; sleep 1 ; done
After a few seconds ps deadlocked. Try that on the old asm semaphores.
It was 100% reproducible, and after I rewrote the rwsemaphores the
deadlock gone away completly.
Your X hanging in R state is completly unrelated to the rwsem ps table
hang problem as far I can tell.
> I'm running a debug X build at this point, and have identified at least
If you can reproduce without starting X I will be interested in fixing
the hang. Maybe you have a graphics card with a fb driver that doesn't
need VESA that maybe works on the alpha, then you could run X without
privilegies. (btw, in theory we could make the VESA thing working as
well using the x86 emulator in SRM but nobody attempted to implement
that yet)
> instead of gcc...then figured what the hell) The rest were with egcs
> 1.1.2. I'll use egcs 1.1.2 in the future.
good.
Andrea
next prev parent reply other threads:[~2001-04-26 15:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-26 3:39 aa's rwsem-generic-6 bug? Process stuck in 'R' state Bob McElrath
2001-04-26 4:11 ` it isn't aa's rwsem-generic-6 bug but something else [Re: aa's rwsem-generic-6 bug? Process stuck in 'R' state.] Andrea Arcangeli
2001-04-26 5:38 ` Bob McElrath
2001-04-26 15:45 ` Andrea Arcangeli [this message]
2001-04-26 16:10 ` Bob McElrath
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