From: Steven Rostedt <srostedt@redhat.com>
To: Li Yu <raise.sail@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Esben Nielsen <nielsen.esben@googlemail.com>
Subject: Re: Hi, I have one question about rt_mutex.
Date: Fri, 11 May 2007 08:16:57 -0400 [thread overview]
Message-ID: <46445EB9.8040106@redhat.com> (raw)
In-Reply-To: <4643CD44.1090903@gmail.com>
Li Yu wrote:
>
> However, I found the sys_futex() do not use rt_mutex, so what's mean of the user futex you said?
> Even, I have not found any usage for rt_mutex in kernel code. Or, some beautiful story will happen in future?
>
Just need to look a little deeper :-)
sys_futex calls do_futex
do_futex with the option of FUTEX_LOCK_PI will call futex_lock_pi
futex_lock_pi calls rt_mutex_timed_lock or rt_mutex_trylock both of
which are part of the rtmutex.c code.
So it's there today :-)
-- Steve
next prev parent reply other threads:[~2007-05-11 12:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-10 7:42 Hi, I have one question about rt_mutex Li Yu
2007-05-10 13:00 ` Steven Rostedt
2007-05-11 1:56 ` Li Yu
2007-05-11 12:16 ` Steven Rostedt [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-05-10 7:34 Li Yu
2007-05-10 8:19 ` Esben Nielsen
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=46445EB9.8040106@redhat.com \
--to=srostedt@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=nielsen.esben@googlemail.com \
--cc=raise.sail@gmail.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.