From: kuznet@ms2.inr.ac.ru
To: morton@nortelnetworks.com (Andrew Morton)
Cc: andrewm@uow.edu.au, linux-kernel@vger.kernel.org
Subject: Re: [patch] NE2000
Date: Wed, 8 Nov 2000 19:45:26 +0300 (MSK) [thread overview]
Message-ID: <200011081645.TAA17955@ms2.inr.ac.ru> (raw)
In-Reply-To: <3A07319B.7E2BD403@asiapacificm01.nt.com> from "Andrew Morton" at Nov 6, 0 10:32:59 pm
Hello!
> > In any case, Andrew, where is the race, when we enter in sleeping state?
> > Wakeup is not lost, it is just not required when we are not going
> > to schedule and force task to running state.
>
> set_current_state(TASK_INTERRUPTIBLE);
> add_wait_queue(...);
> /* window here */
> set_current_state(TASK_INTERRUPTIBLE);
> schedule();
>
> If there's a wakeup by another CPU (or this CPU in an interrupt) in
> that window, current->state will get switched to TASK_RUNNING.
>
> Then it's immediately overwritten and we go to sleep. Lost wakeup.
Look into code yet. It looks sort of different. Again:
> > Wakeup is not lost, it is just not required when we are not going
> > to schedule and force task to running state.
So that it is right not depening on anything.
Alexey
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next prev parent reply other threads:[~2000-11-08 16:46 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.21.0010300344130.6792-100000@web.sajt.cz>
2000-10-29 20:08 ` Jeff Garzik
2000-10-29 20:34 ` Alan Cox
2000-10-30 10:57 ` Jorge Nerin
2000-10-31 13:54 ` changed section attributes Petko Manolov
2000-10-31 14:15 ` Keith Owens
2000-10-31 14:29 ` Petko Manolov
2000-10-31 14:34 ` Keith Owens
2000-10-31 14:41 ` Petko Manolov
[not found] ` <39FFE612.2688A5AD@yahoo.com>
2000-11-03 17:45 ` [patch] NE2000 Jorge Nerin
2000-11-04 5:28 ` Andrew Morton
2000-11-06 11:34 ` Jorge Nerin
2000-11-06 18:40 ` kuznet
2000-11-06 18:46 ` kuznet
2000-11-06 22:32 ` Andrew Morton
2000-11-08 16:45 ` kuznet [this message]
2000-11-07 2:40 ` Andrew Morton
2000-11-08 20:31 ` kuznet
2000-11-09 1:18 ` David S. Miller
2000-11-09 1:27 ` David S. Miller
2000-11-09 11:20 ` David S. Miller
2000-11-10 1:45 ` Tom Leete
2000-11-09 18:03 ` kuznet
2000-11-09 18:01 ` Steve Whitehouse
2000-11-06 7:06 ` ping -f kills ne2k (was:[patch] NE2000) Paul Gortmaker
2000-11-06 20:08 ` Jorge Nerin
2000-11-09 15:11 ` Jorge Nerin
2000-10-30 9:17 ` [patch] NE2000 Paul Gortmaker
2000-10-30 14:58 ` pavel rabel
2000-10-30 19:29 ` Jeff Garzik
2000-11-01 5:31 ` Paul Gortmaker
2000-11-01 8:23 ` Donald Becker
2000-11-01 13:27 ` Jeff Garzik
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