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From: "Jean Delvare" <khali@linux-fr.org>
To: torvalds@osdl.org, dipankar@in.ibm.com
Cc: "Serge Belyshev" <belyshev@depni.sinp.msu.ru>,
	LKML <linux-kernel@vger.kernel.org>,
	"Andrew Morton" <akpm@osdl.org>,
	"Manfred Spraul" <manfred@colorfullife.com>
Subject: Re: VFS: file-max limit 50044 reached
Date: Mon, 17 Oct 2005 10:32:47 +0200 (CEST)	[thread overview]
Message-ID: <JTFDVq8K.1129537967.5390760.khali@localhost> (raw)
In-Reply-To: <Pine.LNX.4.64.0510161912050.23590@g5.osdl.org>


Hi Linus, Dipankar, all,

On 2005-10-17, Linus Torvalds wrote:
> I would _really_ prefer to not do this in the system call hot-path by
> default. That is unquestionably the hottest path in the kernel by far.
>
> It would be _much_ better to set one of the TIF_WORK flags when there's a
> lot of RCU stuff, and do this all in the not-quit-so-hot path of
> do_notify_resume() (on x86, I think others call it other things) instead.
>
> If you use the same kind of "set the TIF flag every 1000 rcu events"
> approach that my failed patch had, you'd be much better off.
>
> In fact, in that path you could even do a full "rcu_process_callbacks()".
> After all, this is not that different from signal handling.
>
> Gaah. I had really hoped to release 2.6.14 tomorrow. It's been a week
> since -rc4.

Isn't reverting the original change an option? 2.6.13 was working OK if
I'm not mistaken.

Thanks,
--
Jean Delvare

  parent reply	other threads:[~2005-10-17  8:44 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-15 13:19 Serge Belyshev
2005-10-15 17:53 ` Serge Belyshev
2005-10-16 16:23   ` Dipankar Sarma
2005-10-16 18:51     ` Serge Belyshev
2005-10-16 18:56       ` Dipankar Sarma
2005-10-17  2:19         ` Linus Torvalds
2005-10-17  4:43           ` Serge Belyshev
2005-10-17  8:32           ` Jean Delvare [this message]
2005-10-17  8:46             ` Dipankar Sarma
2005-10-17  9:10               ` Eric Dumazet
2005-10-17  9:14                 ` Christoph Hellwig
2005-10-17  9:25                   ` Eric Dumazet
2005-10-17 10:32                 ` Dipankar Sarma
2005-10-17 12:10                   ` [RCU problem] was " Eric Dumazet
2005-10-17 12:31                     ` linux-os (Dick Johnson)
2005-10-17 12:36                     ` Dipankar Sarma
2005-10-17 13:28                       ` Eric Dumazet
2005-10-17 13:33                         ` Dipankar Sarma
2005-10-17 14:54                         ` Eric Dumazet
2005-10-17 15:42                   ` Linus Torvalds
2005-10-17 16:01                     ` Eric Dumazet
2005-10-17 16:16                       ` Linus Torvalds
2005-10-17 16:29                         ` Dipankar Sarma
2005-10-17 18:01                           ` Eric Dumazet
2005-10-17 18:31                             ` Dipankar Sarma
2005-10-17 19:00                               ` Linus Torvalds
2005-10-17 18:37                             ` Linus Torvalds
2005-10-17 19:12                               ` Eric Dumazet
2005-10-17 19:30                                 ` Linus Torvalds
2005-10-17 19:39                                   ` Eric Dumazet
2005-10-17 20:14                                     ` Linus Torvalds
2005-10-17 20:25                                       ` Christopher Friesen
2005-10-17 20:24                                         ` Dipankar Sarma
2005-10-18 15:55                                           ` Christopher Friesen
2005-10-17 20:38                                         ` Linus Torvalds
2005-10-17 20:33                                       ` Dipankar Sarma
2005-10-17 22:40                                       ` Linus Torvalds
2005-10-17 22:59                             ` Paul E. McKenney
2005-10-18  9:46                               ` Eric Dumazet
2005-10-18 16:22                                 ` Paul E. McKenney
2005-10-17 18:15                           ` Dipankar Sarma
2005-10-17 18:40                           ` Linus Torvalds
2005-10-17 16:23                       ` Dipankar Sarma
2005-10-17 16:31                       ` Lee Revell
2005-10-17 16:20                     ` Dipankar Sarma
2005-10-17  2:34     ` Linus Torvalds
2005-10-17  3:54       ` Roland Dreier
2005-10-17 11:54       ` Dipankar Sarma

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