From: David Miller <davem@davemloft.net>
To: peterz@infradead.org
Cc: torvalds@linux-foundation.org, tglx@linutronix.de,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
kaber@trash.net
Subject: Re: [patch 1/3] net: serialize hrtimer callback in sched_cbq
Date: Tue, 21 Jul 2009 20:18:55 -0700 (PDT) [thread overview]
Message-ID: <20090721.201855.32703627.davem@davemloft.net> (raw)
In-Reply-To: <1247832892.15751.35.camel@twins>
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 17 Jul 2009 14:14:52 +0200
> On Tue, 2009-07-14 at 09:42 -0700, Linus Torvalds wrote:
>>
>> On Tue, 14 Jul 2009, Peter Zijlstra wrote:
>> >
>> > Linus really hated the softirq mode, which is what prompted me to change
>> > that.
>> >
>> > Now, it might be he only hated the particular interface and the
>> > resulting code, but I think to remember he simply thought the whole
>> > thing daft.
>>
>> Yes. And I hated the bugs it had.
>>
>> Don't make something as core as timers any more complicated. Don't take
>> locks in timers and then complain about deadlocks. If your locking is
>> broken, don't make the core timers be idiotically broken.
>>
>> Because it was. The code was a total mess to follow, and had bugs.
>
> How would something like the below work for people?
I like it, but like Linus said it probably belongs in
kernel/softirq.c
next prev parent reply other threads:[~2009-07-22 3:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-09 21:59 [patch 0/3] net: Sanitizing hrtimer usage in net/sched/sch_cbq.c Thomas Gleixner
2009-07-09 21:59 ` [patch 1/3] net: serialize hrtimer callback in sched_cbq Thomas Gleixner
2009-07-12 20:55 ` David Miller
2009-07-14 8:22 ` Patrick McHardy
2009-07-14 8:30 ` Peter Zijlstra
2009-07-14 16:01 ` David Miller
2009-07-14 8:55 ` Thomas Gleixner
2009-07-14 16:00 ` David Miller
2009-07-14 16:28 ` Peter Zijlstra
2009-07-14 16:42 ` Linus Torvalds
2009-07-17 12:14 ` Peter Zijlstra
2009-07-17 13:26 ` Oliver Hartkopp
2009-07-17 15:44 ` Linus Torvalds
2009-07-22 3:18 ` David Miller [this message]
2009-07-22 6:29 ` Peter Zijlstra
2009-07-22 12:28 ` [PATCH] softirq: tasklet_hrtimer Peter Zijlstra
2009-07-22 15:39 ` David Miller
2009-07-22 16:01 ` Linus Torvalds
2009-07-15 9:56 ` [patch 1/3] net: serialize hrtimer callback in sched_cbq Oliver Hartkopp
2009-07-09 21:59 ` [patch 2/3] net: sanitize hrtimer usage " Thomas Gleixner
2009-07-09 21:59 ` [patch 3/3] net: use HRTIMER_RESTART " Thomas Gleixner
2009-07-10 0:39 ` [patch 0/3] net: Sanitizing hrtimer usage in net/sched/sch_cbq.c David Miller
2009-07-12 20:57 ` David Miller
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