From: Mikulas Patocka <mpatocka@redhat.com>
To: David Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, agk@redhat.com
Subject: Re: stack overflow on Sparc64
Date: Sat, 21 Jun 2008 00:37:15 +0000 [thread overview]
Message-ID: <Pine.LNX.4.64.0806201925400.6353@engineering.redhat.com> (raw)
In-Reply-To: <20080620.154716.75920403.davem@davemloft.net>
On Fri, 20 Jun 2008, David Miller wrote:
> From: Mikulas Patocka <mpatocka@redhat.com>
> Date: Fri, 20 Jun 2008 18:36:09 -0400 (EDT)
>
>> On Fri, 20 Jun 2008, David Miller wrote:
>>
>>> Yes for debugging and other things it has to stay.
>>
>> If you want it to stay, then it doesn't make sense to make functions
>> tail-call-friendly --- because it should not crash with or without
>> debugging.
>
> On the contrary, of course it makes sense to do so.
>
> When debugging is disabled, the kernel will run faster.
>
> We have to fix the stack usage in either case, but from a
> performance standpoint when debugging is disabled the
> tail-call friendly layout is still highly desirable.
I agree, but performance is different problem than stack overflows.
I put all the patches for this overflow problem here:
http://people.redhat.com/mpatocka/patches/kernel-stack-overflow
Mikulas
WARNING: multiple messages have this Message-ID (diff)
From: Mikulas Patocka <mpatocka@redhat.com>
To: David Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, agk@redhat.com
Subject: Re: stack overflow on Sparc64
Date: Fri, 20 Jun 2008 20:37:15 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0806201925400.6353@engineering.redhat.com> (raw)
In-Reply-To: <20080620.154716.75920403.davem@davemloft.net>
On Fri, 20 Jun 2008, David Miller wrote:
> From: Mikulas Patocka <mpatocka@redhat.com>
> Date: Fri, 20 Jun 2008 18:36:09 -0400 (EDT)
>
>> On Fri, 20 Jun 2008, David Miller wrote:
>>
>>> Yes for debugging and other things it has to stay.
>>
>> If you want it to stay, then it doesn't make sense to make functions
>> tail-call-friendly --- because it should not crash with or without
>> debugging.
>
> On the contrary, of course it makes sense to do so.
>
> When debugging is disabled, the kernel will run faster.
>
> We have to fix the stack usage in either case, but from a
> performance standpoint when debugging is disabled the
> tail-call friendly layout is still highly desirable.
I agree, but performance is different problem than stack overflows.
I put all the patches for this overflow problem here:
http://people.redhat.com/mpatocka/patches/kernel-stack-overflow
Mikulas
next prev parent reply other threads:[~2008-06-21 0:37 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-18 0:47 stack overflow on Sparc64 Mikulas Patocka
2008-06-18 0:47 ` Mikulas Patocka
2008-06-18 4:01 ` David Miller
2008-06-18 4:01 ` David Miller
2008-06-19 3:24 ` Mikulas Patocka
2008-06-19 3:24 ` Mikulas Patocka
2008-06-19 3:59 ` David Miller
2008-06-19 3:59 ` David Miller
2008-06-19 5:17 ` Mikulas Patocka
2008-06-19 5:17 ` Mikulas Patocka
2008-06-19 6:37 ` David Miller
2008-06-19 6:37 ` David Miller
2008-06-19 13:01 ` Mikulas Patocka
2008-06-19 13:01 ` Mikulas Patocka
2008-06-20 15:47 ` Mikulas Patocka
2008-06-20 15:47 ` Mikulas Patocka
2008-06-20 17:26 ` David Miller
2008-06-20 17:26 ` David Miller
2008-06-20 20:34 ` Mikulas Patocka
2008-06-20 20:34 ` Mikulas Patocka
2008-06-20 20:37 ` David Miller
2008-06-20 20:37 ` David Miller
2008-06-20 21:26 ` Mikulas Patocka
2008-06-20 21:26 ` Mikulas Patocka
2008-06-20 21:41 ` David Miller
2008-06-20 21:41 ` David Miller
2008-06-21 4:51 ` David Miller
2008-06-21 4:51 ` David Miller
2008-06-21 19:42 ` Mikulas Patocka
2008-06-21 19:42 ` Mikulas Patocka
2008-06-22 7:03 ` David Miller
2008-06-22 7:03 ` David Miller
2008-06-22 13:48 ` Mikulas Patocka
2008-06-22 13:48 ` Mikulas Patocka
2008-08-12 6:30 ` David Miller
2008-08-12 6:30 ` David Miller
2008-08-12 8:22 ` David Miller
2008-08-12 8:22 ` David Miller
2008-08-13 0:53 ` Mikulas Patocka
2008-08-13 0:53 ` Mikulas Patocka
2008-08-13 0:59 ` David Miller
2008-08-13 0:59 ` David Miller
2008-08-13 1:11 ` console handover badness [was: stack overflow on Sparc64] Mikulas Patocka
2008-08-13 1:11 ` Mikulas Patocka
2008-08-13 1:22 ` console handover badness David Miller
2008-08-13 1:22 ` David Miller
2008-08-13 1:40 ` David Miller
2008-08-13 1:40 ` David Miller
2008-08-13 8:50 ` David Miller
2008-08-13 8:50 ` David Miller
2008-08-13 12:46 ` Mikulas Patocka
2008-08-13 12:46 ` Mikulas Patocka
2008-08-14 3:25 ` David Miller
2008-08-14 3:25 ` David Miller
2008-08-14 23:11 ` Bootmem allocator broken [was: console handover badness] Mikulas Patocka
2008-08-14 23:11 ` Mikulas Patocka
2008-08-14 23:25 ` Bootmem allocator broken David Miller
2008-08-14 23:25 ` David Miller
2008-08-15 11:09 ` Alexander Beregalov
2008-08-15 11:09 ` Alexander Beregalov
2008-08-15 21:13 ` David Miller
2008-08-15 21:13 ` David Miller
2008-08-14 23:40 ` Johannes Weiner
2008-08-14 23:40 ` Johannes Weiner
2008-06-20 21:14 ` stack overflow on Sparc64 Mikulas Patocka
2008-06-20 21:14 ` Mikulas Patocka
2008-06-20 21:20 ` David Miller
2008-06-20 21:20 ` David Miller
2008-06-20 21:25 ` Mikulas Patocka
2008-06-20 21:25 ` Mikulas Patocka
2008-06-20 21:44 ` David Miller
2008-06-20 21:44 ` David Miller
2008-06-20 21:47 ` David Miller
2008-06-20 21:47 ` David Miller
2008-06-20 22:22 ` Mikulas Patocka
2008-06-20 22:22 ` Mikulas Patocka
2008-06-20 22:28 ` David Miller
2008-06-20 22:28 ` David Miller
2008-06-20 22:36 ` Mikulas Patocka
2008-06-20 22:36 ` Mikulas Patocka
2008-06-20 22:47 ` David Miller
2008-06-20 22:47 ` David Miller
2008-06-21 0:37 ` Mikulas Patocka [this message]
2008-06-21 0:37 ` Mikulas Patocka
2008-06-20 22:33 ` Mikulas Patocka
2008-06-20 22:33 ` Mikulas Patocka
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