From: Glauber Costa <glommer@parallels.com>
To: Christoph Lameter <cl@linux.com>
Cc: linux-mm@kvack.org, Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: Any reason to use put_page in slub.c?
Date: Tue, 31 Jul 2012 18:18:17 +0400 [thread overview]
Message-ID: <5017E929.70602@parallels.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1207310915150.32295@router.home>
On 07/31/2012 06:17 PM, Christoph Lameter wrote:
> On Tue, 31 Jul 2012, Glauber Costa wrote:
>
>> On 07/31/2012 06:09 PM, Christoph Lameter wrote:
>>> That is understood. Typically these object where page sized though and
>>> various assumptions (pretty dangerous ones as you are finding out) are
>>> made regarding object reuse. The fallback of SLUB for higher order allocs
>>> to the page allocator avoids these problems for higher order pages.
>> omg...
>
> I would be very thankful if you would go through the tree and check for
> any remaining use cases like that. Would take care of your problem.
I would be happy to do it. Do you have any example of any user that
behaved like this in the past, so I can search for something similar?
This can potentially take many forms, and auditing every kfree out there
is not humanly possible. The best I can do is to search for known
patterns here...
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-07-31 14:21 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 12:19 Glauber Costa
2012-07-27 15:55 ` Christoph Lameter
2012-07-30 7:53 ` Glauber Costa
2012-07-30 19:23 ` Christoph Lameter
2012-07-31 8:25 ` Glauber Costa
2012-07-31 14:09 ` Christoph Lameter
2012-07-31 14:09 ` Glauber Costa
2012-07-31 14:17 ` Christoph Lameter
2012-07-31 14:18 ` Glauber Costa [this message]
2012-07-31 14:31 ` Christoph Lameter
2012-07-31 14:52 ` James Bottomley
2012-08-01 12:42 ` Glauber Costa
2012-08-01 18:10 ` Christoph Lameter
2012-08-02 7:55 ` Glauber Costa
2012-08-02 8:07 ` James Bottomley
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5017E929.70602@parallels.com \
--to=glommer@parallels.com \
--cc=akpm@linux-foundation.org \
--cc=cl@linux.com \
--cc=linux-mm@kvack.org \
--cc=penberg@kernel.org \
--cc=rientjes@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox