From: Andrew Morton <akpm@osdl.org>
To: andrea@cpushare.com
Cc: bruce@andrew.cmu.edu, alan@lxorguk.ukuu.org.uk,
arjan@infradead.org, bunk@stusta.de, rlrevell@joe-job.com,
linux-kernel@vger.kernel.org, alan@redhat.com, torvalds@osdl.org,
mingo@elte.hu
Subject: Re: [PATCH] TIF_NOTSC and SECCOMP prctl
Date: Thu, 13 Jul 2006 23:27:27 -0700 [thread overview]
Message-ID: <20060713232727.ead103f8.akpm@osdl.org> (raw)
In-Reply-To: <20060714060932.GE18774@opteron.random>
On Fri, 14 Jul 2006 08:09:32 +0200
andrea@cpushare.com wrote:
> The only thing left worth discussing is why if I set TIF_NOTSC to 10
> instead of 19 the kernel was crashing hard... After I checked and
> rechecked everything else I deduced it had to be that number and after
> changing it to 19 everything works fine... I also verified the first
> rdtsc kills the task with a sigsegv. It would be nice to make sure
> it's not a bug in the below patch that 10 didn't work but just some
> hidden kernel "feature" ;).
Using a bit <= 15 will cause kernel to take the work_notifysig path
"pending work-to-be-done flags are in LSW". I'm not sure what happens if
there's such a flag set but nothing is set up to handle it. I guess it
stays set and processes never get out of the kernel again.
Perhaps TIF_SECCOMP should be >= 16 too - the special-case in
_TIF_ALLWORK_MASK looks odd.
next prev parent reply other threads:[~2006-07-14 6:31 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-29 19:21 [2.6 patch] let CONFIG_SECCOMP default to n Adrian Bunk
2006-06-30 0:44 ` Lee Revell
2006-06-30 1:07 ` Andrew Morton
2006-06-30 1:40 ` Adrian Bunk
2006-06-30 4:52 ` Andrea Arcangeli
2006-06-30 9:47 ` Ingo Molnar
2006-06-30 14:58 ` andrea
2006-07-11 7:36 ` [patch] " Ingo Molnar
2006-07-11 14:17 ` andrea
2006-07-11 14:32 ` Arjan van de Ven
2006-07-11 15:31 ` andrea
2006-07-11 15:54 ` Arjan van de Ven
2006-07-11 16:13 ` andrea
2006-07-11 16:23 ` Arjan van de Ven
2006-07-11 16:57 ` Alan Cox
2006-07-11 16:25 ` Alan Cox
2006-07-11 16:02 ` Adrian Bunk
2006-07-11 16:16 ` andrea
2006-07-11 16:24 ` Alan Cox
2006-07-12 15:43 ` Andi Kleen
2006-07-12 21:07 ` Ingo Molnar
2006-07-12 22:06 ` Andi Kleen
2006-07-12 22:19 ` Ingo Molnar
2006-07-12 22:33 ` Andi Kleen
2006-07-12 22:49 ` Ingo Molnar
2006-07-13 3:16 ` Andrea Arcangeli
2006-07-13 11:23 ` Jeff Dike
2006-07-13 11:35 ` Ingo Molnar
2006-07-13 3:04 ` Andrea Arcangeli
2006-07-13 3:12 ` Linus Torvalds
2006-07-13 4:40 ` Andrea Arcangeli
2006-07-13 4:51 ` andrea
2006-07-13 5:12 ` Linus Torvalds
2006-07-13 6:22 ` andrea
2006-07-13 1:51 ` Andrew Morton
2006-07-13 2:00 ` Linus Torvalds
2006-07-13 7:44 ` James Bruce
2006-07-13 8:34 ` andrea
2006-07-13 9:18 ` Andrew Morton
2006-07-14 6:09 ` [PATCH] TIF_NOTSC and SECCOMP prctl andrea
2006-07-14 6:27 ` Andrew Morton [this message]
2006-07-14 6:33 ` andrea
2006-07-13 12:13 ` [patch] let CONFIG_SECCOMP default to n Andi Kleen
2006-07-12 21:22 ` Ingo Molnar
2006-07-12 22:11 ` Andi Kleen
2006-07-11 15:54 ` Pavel Machek
2006-06-30 12:39 ` [2.6 patch] " Alan Cox
2006-06-30 2:35 ` Randy.Dunlap
2006-06-30 15:03 ` Lee Revell
2006-07-08 9:23 ` Andrea Arcangeli
2006-07-11 1:59 ` Andrew James Wade
2006-07-11 4:16 ` andrea
2006-07-11 20:19 ` Andrew James Wade
2006-07-12 21:05 ` andrea
2006-07-12 22:02 ` Alan Cox
2006-07-12 23:44 ` andrea
2006-07-13 21:29 ` Pavel Machek
2006-07-13 23:11 ` andrea
2006-07-13 23:20 ` Pavel Machek
2006-07-14 0:34 ` andrea
2006-07-15 2:55 ` Valdis.Kletnieks
2006-07-16 0:51 ` andrea
2006-07-16 1:54 ` Pavel Machek
2006-07-16 15:36 ` andrea
2006-07-13 2:56 ` Andrew James Wade
2006-07-12 21:13 ` Ingo Molnar
2006-07-13 1:16 ` andrea
2006-07-13 1:37 ` Andrew James Wade
2006-07-18 10:20 [PATCH] TIF_NOTSC and SECCOMP prctl Chuck Ebbert
2006-07-18 13:29 ` andrea
2006-07-25 21:44 ` andrea
2006-07-26 8:07 ` Ingo Molnar
2006-07-26 11:45 ` andrea
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