From: David Ahern <david.ahern@oracle.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>
Cc: "David S. Miller" <davem@davemloft.net>,
LKML <linux-kernel@vger.kernel.org>,
sparclinux@vger.kernel.org
Subject: Re: 4.0.0-rc4: panic in free_block
Date: Fri, 20 Mar 2015 18:05:05 +0000 [thread overview]
Message-ID: <550C6151.8070803@oracle.com> (raw)
In-Reply-To: <CA+55aFyQWa0PjT-3y-HB9P-UAzThrZme5gj1P6P6hMTTF9cMtA@mail.gmail.com>
On 3/20/15 10:58 AM, Linus Torvalds wrote:
> That said, SLAB is probably also almost unheard of in high-CPU
> configurations, since slub has all the magical unlocked lists etc for
> scalability. So maybe it's a generic SLAB bug, and nobody with lots of
> CPU's is testing SLAB.
>
Evidently, it is a well known problem internally that goes back to at
least 2.6.39.
To this point I have not paid attention to the allocators. At what point
is SLUB considered stable for large systems? Is 2.6.39 stable?
As for SLAB it is not clear if this is a sparc only problem. Perhaps the
config should have a warning? It looks like SLAB is still the default
for most arch.
DaveM: do you mind if I submit a patch to change the default for sparc
to SLUB?
Now that the monster is unleashed, off to other problems...
Thanks,
David
WARNING: multiple messages have this Message-ID (diff)
From: David Ahern <david.ahern@oracle.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>
Cc: "David S. Miller" <davem@davemloft.net>,
LKML <linux-kernel@vger.kernel.org>,
sparclinux@vger.kernel.org
Subject: Re: 4.0.0-rc4: panic in free_block
Date: Fri, 20 Mar 2015 12:05:05 -0600 [thread overview]
Message-ID: <550C6151.8070803@oracle.com> (raw)
In-Reply-To: <CA+55aFyQWa0PjT-3y-HB9P-UAzThrZme5gj1P6P6hMTTF9cMtA@mail.gmail.com>
On 3/20/15 10:58 AM, Linus Torvalds wrote:
> That said, SLAB is probably also almost unheard of in high-CPU
> configurations, since slub has all the magical unlocked lists etc for
> scalability. So maybe it's a generic SLAB bug, and nobody with lots of
> CPU's is testing SLAB.
>
Evidently, it is a well known problem internally that goes back to at
least 2.6.39.
To this point I have not paid attention to the allocators. At what point
is SLUB considered stable for large systems? Is 2.6.39 stable?
As for SLAB it is not clear if this is a sparc only problem. Perhaps the
config should have a warning? It looks like SLAB is still the default
for most arch.
DaveM: do you mind if I submit a patch to change the default for sparc
to SLUB?
Now that the monster is unleashed, off to other problems...
Thanks,
David
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WARNING: multiple messages have this Message-ID (diff)
From: David Ahern <david.ahern@oracle.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>
Cc: "David S. Miller" <davem@davemloft.net>,
LKML <linux-kernel@vger.kernel.org>,
sparclinux@vger.kernel.org
Subject: Re: 4.0.0-rc4: panic in free_block
Date: Fri, 20 Mar 2015 12:05:05 -0600 [thread overview]
Message-ID: <550C6151.8070803@oracle.com> (raw)
In-Reply-To: <CA+55aFyQWa0PjT-3y-HB9P-UAzThrZme5gj1P6P6hMTTF9cMtA@mail.gmail.com>
On 3/20/15 10:58 AM, Linus Torvalds wrote:
> That said, SLAB is probably also almost unheard of in high-CPU
> configurations, since slub has all the magical unlocked lists etc for
> scalability. So maybe it's a generic SLAB bug, and nobody with lots of
> CPU's is testing SLAB.
>
Evidently, it is a well known problem internally that goes back to at
least 2.6.39.
To this point I have not paid attention to the allocators. At what point
is SLUB considered stable for large systems? Is 2.6.39 stable?
As for SLAB it is not clear if this is a sparc only problem. Perhaps the
config should have a warning? It looks like SLAB is still the default
for most arch.
DaveM: do you mind if I submit a patch to change the default for sparc
to SLUB?
Now that the monster is unleashed, off to other problems...
Thanks,
David
next prev parent reply other threads:[~2015-03-20 18:05 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 15:07 4.0.0-rc4: panic in free_block David Ahern
2015-03-20 15:07 ` David Ahern
2015-03-20 16:48 ` Linus Torvalds
2015-03-20 16:48 ` Linus Torvalds
2015-03-20 16:48 ` Linus Torvalds
2015-03-20 16:53 ` David Ahern
2015-03-20 16:53 ` David Ahern
2015-03-20 16:53 ` David Ahern
2015-03-20 16:58 ` Linus Torvalds
2015-03-20 16:58 ` Linus Torvalds
2015-03-20 16:58 ` Linus Torvalds
2015-03-20 18:05 ` David Ahern [this message]
2015-03-20 18:05 ` David Ahern
2015-03-20 18:05 ` David Ahern
2015-03-20 18:53 ` Linus Torvalds
2015-03-20 18:53 ` Linus Torvalds
2015-03-20 18:53 ` Linus Torvalds
2015-03-20 19:04 ` David Ahern
2015-03-20 19:04 ` David Ahern
2015-03-20 19:04 ` David Ahern
2015-03-20 19:47 ` David Miller
2015-03-20 19:47 ` David Miller
2015-03-20 19:47 ` David Miller
2015-03-20 19:54 ` David Ahern
2015-03-20 19:54 ` David Ahern
2015-03-20 19:54 ` David Ahern
2015-03-20 20:19 ` David Miller
2015-03-20 20:19 ` David Miller
2015-03-20 20:19 ` David Miller
2015-03-20 19:42 ` David Miller
2015-03-20 19:42 ` David Miller
2015-03-20 19:42 ` David Miller
2015-03-20 20:01 ` Dave Hansen
2015-03-20 20:01 ` Dave Hansen
2015-03-20 20:01 ` Dave Hansen
2015-03-20 21:17 ` Linus Torvalds
2015-03-20 21:17 ` Linus Torvalds
2015-03-20 22:49 ` David Ahern
2015-03-20 22:49 ` David Ahern
2015-03-21 0:18 ` David Ahern
2015-03-21 0:18 ` David Ahern
2015-03-21 0:34 ` David Rientjes
2015-03-21 0:34 ` David Rientjes
2015-03-21 0:39 ` David Ahern
2015-03-21 0:39 ` David Ahern
2015-03-21 0:47 ` Linus Torvalds
2015-03-21 0:47 ` Linus Torvalds
2015-03-21 17:45 ` David Ahern
2015-03-21 17:45 ` David Ahern
2015-03-21 18:49 ` Linus Torvalds
2015-03-21 18:49 ` Linus Torvalds
2015-03-21 18:49 ` Linus Torvalds
2015-03-22 17:36 ` David Miller
2015-03-22 17:36 ` David Miller
2015-03-22 17:36 ` David Miller
2015-03-22 19:25 ` Bob Picco
2015-03-22 19:25 ` Bob Picco
2015-03-22 19:25 ` Bob Picco
2015-03-22 19:47 ` Linus Torvalds
2015-03-22 19:47 ` Linus Torvalds
2015-03-22 19:47 ` Linus Torvalds
2015-03-22 22:23 ` David Miller
2015-03-22 22:23 ` David Miller
2015-03-22 22:23 ` David Miller
2015-03-22 23:35 ` David Ahern
2015-03-22 23:35 ` David Ahern
2015-03-22 23:35 ` David Ahern
2015-03-22 23:54 ` David Miller
2015-03-22 23:54 ` David Miller
2015-03-22 23:54 ` David Miller
2015-03-23 0:03 ` David Ahern
2015-03-23 0:03 ` David Ahern
2015-03-23 0:03 ` David Ahern
2015-03-23 2:00 ` David Miller
2015-03-23 2:00 ` David Miller
2015-03-23 2:00 ` David Miller
2015-03-23 2:19 ` David Miller
2015-03-23 2:19 ` David Miller
2015-03-23 2:19 ` David Miller
2015-03-23 16:25 ` David Miller
2015-03-23 16:25 ` David Miller
2015-03-23 16:25 ` David Miller
2015-03-23 16:51 ` John Stoffel
2015-03-23 16:51 ` John Stoffel
2015-03-23 16:51 ` John Stoffel
2015-03-23 19:16 ` David Miller
2015-03-23 19:16 ` David Miller
2015-03-23 19:16 ` David Miller
2015-03-23 19:56 ` John Stoffel
2015-03-23 19:56 ` John Stoffel
2015-03-23 19:56 ` John Stoffel
2015-03-23 20:08 ` David Miller
2015-03-23 20:08 ` David Miller
2015-03-23 20:08 ` David Miller
2015-03-23 17:00 ` Linus Torvalds
2015-03-23 17:00 ` Linus Torvalds
2015-03-23 17:00 ` Linus Torvalds
2015-03-23 19:08 ` David Miller
2015-03-23 19:08 ` David Miller
2015-03-23 19:08 ` David Miller
2015-03-23 19:47 ` Linus Torvalds
2015-03-23 19:47 ` Linus Torvalds
2015-03-23 19:47 ` Linus Torvalds
2015-03-23 19:52 ` David Miller
2015-03-23 19:52 ` David Miller
2015-03-23 19:52 ` David Miller
2015-03-23 17:34 ` David Ahern
2015-03-23 17:34 ` David Ahern
2015-03-23 17:34 ` David Ahern
2015-03-23 19:35 ` David Miller
2015-03-23 19:35 ` David Miller
2015-03-23 19:35 ` David Miller
2015-03-23 19:58 ` David Ahern
2015-03-23 19:58 ` David Ahern
2015-03-23 19:58 ` David Ahern
2015-03-24 1:01 ` David Ahern
2015-03-24 1:01 ` David Ahern
2015-03-24 1:01 ` David Ahern
2015-03-24 14:57 ` Bob Picco
2015-03-24 14:57 ` Bob Picco
2015-03-24 14:57 ` Bob Picco
2015-03-24 16:05 ` David Miller
2015-03-24 16:05 ` David Miller
2015-03-24 16:05 ` David Miller
2015-03-22 23:49 ` Linus Torvalds
2015-03-22 23:49 ` Linus Torvalds
2015-03-22 23:49 ` Linus Torvalds
2015-03-22 23:57 ` David Miller
2015-03-22 23:57 ` David Miller
2015-03-22 23:57 ` David Miller
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