From: Grygorii Strashko <grygorii.strashko@ti.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: [rfc patch v4.4-rt2] sched: fix up preempt lazy forward port
Date: Fri, 22 Jan 2016 13:58:38 +0200 [thread overview]
Message-ID: <56A2196E.1020101@ti.com> (raw)
In-Reply-To: <20160118201828.GE12309@linutronix.de>
On 01/18/2016 10:18 PM, Sebastian Andrzej Siewior wrote:
> * Mike Galbraith | 2016-01-18 10:08:23 [+0100]:
>
>> --- a/arch/x86/entry/common.c
>> +++ b/arch/x86/entry/common.c
>> @@ -220,14 +220,14 @@ long syscall_trace_enter(struct pt_regs
>>
>> #define EXIT_TO_USERMODE_LOOP_FLAGS \
>> (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_UPROBE | \
>> - _TIF_NEED_RESCHED | _TIF_USER_RETURN_NOTIFY)
>> + _TIF_NEED_RESCHED_MASK | _TIF_USER_RETURN_NOTIFY)
>
> If I read this right, the loop where this define is used
> _TIF_ALLWORK_MASK in v4.1 of which _TIF_NEED_RESCHED_MASK was part of.
> Adding this will reassmeble the old behaviour.
> …
Just a question (sorry if dumb). ARM has _TIF_WORK_MASK defined:
#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
_TIF_NOTIFY_RESUME | _TIF_UPROBE)
which is used to calculate loop exit condition in
do_work_pending() (arch/arm/kernel/signal.c).
Should _TIF_WORK_MASK also contain _TIF_NEED_RESCHED_LAZY?
--
regards,
-grygorii
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next prev parent reply other threads:[~2016-01-22 11:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-18 9:08 [rfc patch v4.4-rt2] sched: fix up preempt lazy forward port Mike Galbraith
2016-01-18 20:18 ` Sebastian Andrzej Siewior
2016-01-19 2:29 ` Mike Galbraith
2016-01-21 12:54 ` Sebastian Andrzej Siewior
2016-01-22 12:24 ` Grygorii Strashko
2016-01-22 13:19 ` Sebastian Andrzej Siewior
2016-01-22 13:34 ` Grygorii Strashko
2016-01-22 14:14 ` Sebastian Andrzej Siewior
2016-01-22 15:04 ` Grygorii Strashko
2016-01-22 18:21 ` Grygorii Strashko
2016-02-21 15:11 ` [patch] sched,rt: __always_inline preemptible_lazy() Mike Galbraith
2016-01-19 4:41 ` [rfc patch v4.4-rt2] sched: fix up preempt lazy forward port Mike Galbraith
2016-01-19 5:14 ` Mike Galbraith
2016-01-22 11:58 ` Grygorii Strashko [this message]
2016-01-22 12:54 ` Sebastian Andrzej Siewior
2016-01-22 20:40 ` Sebastian Andrzej Siewior
2016-01-25 17:14 ` Grygorii Strashko
2016-02-01 13:04 ` Sebastian Andrzej Siewior
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