From: Christoph Lameter <cl@linux.com>
To: David Rientjes <rientjes@google.com>
Cc: Glauber Costa <glommer@parallels.com>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
linux-mm@kvack.org, Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH v2] slab+slob: dup name string
Date: Wed, 23 May 2012 08:53:29 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1205230849410.29893@router.home> (raw)
In-Reply-To: <alpine.DEB.2.00.1205222048380.28165@chino.kir.corp.google.com>
On Tue, 22 May 2012, David Rientjes wrote:
> On Tue, 22 May 2012, Christoph Lameter wrote:
>
> > > [ v2: Also dup string for early caches, requested by David Rientjes ]
> >
> > kstrdups that early could cause additional issues. Its better to leave
> > things as they were.
> >
>
> No, it's not, there's no reason to prevent caches created before
> g_cpucache_up <= EARLY to be destroyed because it makes a patch easier to
> implement and then leave that little gotcha as an undocumented treasure
> for someone to find when they try it later on.
g_cpucache_up <= EARLY is slab bootstrap code and the system is in a
pretty fragile state. Plus the the kmalloc logic *depends* on these
caches being present. Removing those is not a good idea. The other caches
that are created at that point are needed to create more caches.
There is no reason to remove these caches.
> This is much easier to do, just statically allocate the const char *'s
> needed for the boot caches and then set their ->name's manually in
> kmem_cache_init() and then avoid the kfree() in kmem_cache_destroy() if
> the name is between &boot_cache_name[0] and &boot_cache_name[n].
Yeah that is already occurring for some of the boot caches.
--
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/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-05-23 13:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-22 9:51 Glauber Costa
2012-05-22 13:58 ` Christoph Lameter
2012-05-22 15:27 ` Glauber Costa
2012-05-22 17:18 ` Christoph Lameter
2012-05-23 3:55 ` David Rientjes
2012-05-23 9:25 ` Glauber Costa
2012-05-23 13:53 ` Christoph Lameter [this message]
2012-05-24 1:01 ` David Rientjes
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=alpine.DEB.2.00.1205230849410.29893@router.home \
--to=cl@linux.com \
--cc=cgroups@vger.kernel.org \
--cc=glommer@parallels.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=penberg@cs.helsinki.fi \
--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