From: Oleg Nesterov <oleg@tv-sign.ru>
To: Andrew Morton <akpm@osdl.org>
Cc: Shailabh Nagar <nagar@watson.ibm.com>,
Balbir Singh <balbir@in.ibm.com>, Jay Lan <jlan@sgi.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 4/6] taskstats_tgid_alloc: optimization
Date: Fri, 27 Oct 2006 03:21:46 +0400 [thread overview]
Message-ID: <20061026232146.GA529@oleg> (raw)
Every subthread (except first) does unneeded kmem_cache_alloc/kmem_cache_free.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
--- STATS/include/linux/taskstats_kern.h~4_alloc 2006-10-27 01:28:31.000000000 +0400
+++ STATS/include/linux/taskstats_kern.h 2006-10-27 01:39:10.000000000 +0400
@@ -32,6 +32,9 @@ static inline void taskstats_tgid_alloc(
struct taskstats *stats;
unsigned long flags;
+ if (sig->stats != NULL)
+ return;
+
stats = kmem_cache_zalloc(taskstats_cache, SLAB_KERNEL);
if (!stats)
return;
reply other threads:[~2006-10-26 23:21 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20061026232146.GA529@oleg \
--to=oleg@tv-sign.ru \
--cc=akpm@osdl.org \
--cc=balbir@in.ibm.com \
--cc=jlan@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=nagar@watson.ibm.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.