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
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