From: Bill Huey (hui) <billh@gnuppy.monkey.org>
To: Esben Nielsen <simlo@phys.au.dk>
Cc: Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
david singleton <dsingleton@mvista.com>,
linux-kernel@vger.kernel.org,
"Bill Huey (hui)" <billh@gnuppy.monkey.org>
Subject: Re: RT Mutex patch and tester [PREEMPT_RT]
Date: Mon, 16 Jan 2006 02:22:55 -0800 [thread overview]
Message-ID: <20060116102255.GA19401@gnuppy.monkey.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0601160926360.4219-100000@lifa01.phys.au.dk>
On Mon, Jan 16, 2006 at 09:35:42AM +0100, Esben Nielsen wrote:
> On Sat, 14 Jan 2006, Bill Huey wrote:
> I am not precisely sure what you mean by "false reporting".
>
> Handing off BKL is done in schedule() in sched.c. I.e. if B owns a normal
> mutex, A will give BKL to B when A calls schedule() in the down-operation
> of that mutex.
Task A holding BKL would have to drop BKL when it blocks against a mutex held
by task B in my example and therefore must hit schedule() before any pi boost
operation happens. I'll take another look at your code just to see if this is
clear.
bill
next prev parent reply other threads:[~2006-01-16 10:25 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-11 17:25 RT Mutex patch and tester [PREEMPT_RT] Esben Nielsen
2006-01-11 17:51 ` Steven Rostedt
2006-01-11 21:45 ` Esben Nielsen
2006-01-12 11:33 ` Bill Huey
2006-01-12 12:54 ` Esben Nielsen
2006-01-13 8:07 ` Bill Huey
2006-01-13 8:47 ` Esben Nielsen
2006-01-13 10:19 ` Bill Huey
2006-01-15 4:24 ` Bill Huey
2006-01-16 8:35 ` Esben Nielsen
2006-01-16 10:22 ` Bill Huey [this message]
2006-01-16 10:53 ` Bill Huey
2006-01-16 11:30 ` Esben Nielsen
[not found] ` <Pine.LNX.4.44L0.0601181120100.1993-201000@lifa02.phys.au.dk>
2006-01-18 10:38 ` Ingo Molnar
2006-01-18 12:49 ` Steven Rostedt
2006-01-18 14:18 ` Esben Nielsen
[not found] ` <Pine.LNX.4.44L0.0601230047290.31387-201000@lifa01.phys.au.dk>
2006-01-23 0:38 ` david singleton
2006-01-23 2:04 ` Bill Huey
2006-01-23 9:33 ` Esben Nielsen
2006-01-23 14:23 ` Steven Rostedt
2006-01-23 15:14 ` Esben Nielsen
2006-01-27 15:18 ` Esben Nielsen
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