From: Philipp Rumpf <prumpf@mandrakesoft.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Rusty Russell <rusty@linuxcare.com.au>, linux-kernel@vger.kernel.org
Subject: Re: Linux 2.4.1-ac15
Date: Thu, 22 Feb 2001 18:01:03 -0600 [thread overview]
Message-ID: <20010222180103.B30762@mandrakesoft.mandrakesoft.com> (raw)
In-Reply-To: <E14Vl7y-0001FG-00@halfway> <E14Vstm-0003q3-00@the-village.bc.nu>
In-Reply-To: <E14Vstm-0003q3-00@the-village.bc.nu>; from Alan Cox on Thu, Feb 22, 2001 at 10:22:56AM +0000
On Thu, Feb 22, 2001 at 10:22:56AM +0000, Alan Cox wrote:
> > > We can take page faults in interrupt handlers in 2.4 so I had to use a
> > > spinlock, but that sounds the same
> >
> > We can? Woah, please explain.
>
> vmalloc does a lazy load of the tlb. That can lead to the exception table
> being walked on an IRQ
But will that ever get to the search_exception_table code ? (I don't
think that would be valid, but other exceptions in interrupts might be -
cf some of the self-modifying mmx copy versions).
Oh, like rdmsr_eio on SMP systems. Definitely valid, and it can deadlock
with both the semaphore and the spinlock AFAICS. Alan, is this an issue ?
next prev parent reply other threads:[~2001-02-23 0:01 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-15 23:15 Linux 2.4.1-ac15 Alan Cox
2001-02-19 9:47 ` Philipp Rumpf
2001-02-19 11:35 ` Alan Cox
2001-02-19 11:54 ` Philipp Rumpf
2001-02-19 16:03 ` Alan Cox
2001-02-19 16:21 ` Philipp Rumpf
2001-02-19 16:27 ` Alan Cox
2001-02-19 16:34 ` Philipp Rumpf
2001-02-19 16:41 ` Alan Cox
2001-02-19 16:48 ` Philipp Rumpf
2001-02-19 17:03 ` Alan Cox
2001-02-21 3:02 ` Rusty Russell
2001-02-21 12:01 ` Alan Cox
2001-02-22 2:05 ` Rusty Russell
2001-02-22 10:22 ` Alan Cox
2001-02-23 0:01 ` Philipp Rumpf [this message]
2001-02-22 2:27 ` Linus Torvalds
2001-02-22 10:29 ` Alan Cox
2001-02-23 20:40 ` Andrea Arcangeli
2001-02-23 21:09 ` Linus Torvalds
2001-02-24 4:04 ` Andrea Arcangeli
2001-02-24 4:54 ` Andrea Arcangeli
2001-02-19 11:54 ` Keith Owens
2001-02-19 12:15 ` Philipp Rumpf
2001-02-19 13:15 ` Keith Owens
2001-02-19 13:25 ` Christoph Hellwig
2001-02-19 21:32 ` Keith Owens
2001-02-19 13:36 ` Philipp Rumpf
2001-02-19 15:23 ` Manfred Spraul
2001-02-19 16:04 ` Alan Cox
2001-02-19 21:52 ` Keith Owens
2001-02-20 12:29 ` Philipp Rumpf
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