From: Karel Zak <kzak@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kerolasa@gmail.com, Sami Kerola <kerolasa@iki.fi>,
Al Viro <viro@zeniv.linux.org.uk>,
Doug Ledford <dledford@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-kernel@vger.kernel.org
Subject: Re: ipc: object information data in proc and sysfs
Date: Tue, 20 Nov 2012 13:21:15 +0100 [thread overview]
Message-ID: <20121120122115.GA2006@x2.net.home> (raw)
In-Reply-To: <20121119161250.ae0b25ff.akpm@linux-foundation.org>
On Mon, Nov 19, 2012 at 04:12:50PM -0800, Andrew Morton wrote:
> Where's the benefit in switching ipcs over to using /proc?
>
> procfs reads are probably slower than the syscalls?
32bit userspace and 64bit kernel (RHEL ppc64), it seems more reliable
read from /proc than use the syscalls.
I guess that IPC_64 flag for shmctl() commands is used by libc in 64bit
userspace only.
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
next prev parent reply other threads:[~2012-11-20 12:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-18 12:31 Sami Kerola
2012-11-20 0:12 ` Andrew Morton
2012-11-20 12:21 ` Karel Zak [this message]
2012-11-25 11:11 ` Sami Kerola
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