From: Arjan van de Ven <arjanv@redhat.com>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@zip.com.au>,
Rusty Russell <rusty@rustcorp.com.au>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8
Date: 28 Sep 2002 12:22:09 +0200 [thread overview]
Message-ID: <1033208530.1695.2.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.44.0209270922340.2013-100000@home.transmeta.com>
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On Fri, 2002-09-27 at 18:26, Linus Torvalds wrote:
>
> On Fri, 27 Sep 2002, Ingo Molnar wrote:
> >
> > the attached patch implements the virtual => physical cache. Right now
> > only the COW code calls the invalidation function, because futexes do not
> > need notification on unmap.
>
> Ok, looks good. Except you make get_user_page() do a write fault on the
> page, and one of the points of this approach was that that shouldn't even
> be needed. Or did I miss some case that does need it?
get_user_page() cannot/should not ever do a pagefault via the pagefault
code otherwise the coredump code will take the mmap semaphore
recursively and deadlock.
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prev parent reply other threads:[~2002-09-28 10:14 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-27 16:24 [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8 Ingo Molnar
2002-09-27 16:26 ` Linus Torvalds
2002-09-27 16:42 ` Ingo Molnar
2002-09-27 16:47 ` Linus Torvalds
2002-09-27 17:01 ` Ingo Molnar
2002-09-27 17:05 ` Linus Torvalds
2002-09-27 17:33 ` Ingo Molnar
2002-09-27 17:32 ` Linus Torvalds
2002-09-27 17:42 ` Ingo Molnar
2002-09-27 17:48 ` Linus Torvalds
2002-09-27 18:54 ` [patch] 'virtual => physical page mapping cache' take #2, vcache-2.5.38-C4 Ingo Molnar
2002-09-27 19:12 ` Ingo Molnar
2002-10-15 5:15 ` Rusty Russell
2002-09-27 17:44 ` [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8 Ingo Molnar
2002-09-27 17:42 ` Chris Wedgwood
2002-09-27 17:53 ` Ingo Molnar
2002-09-27 17:59 ` Chris Wedgwood
2002-09-27 18:01 ` Alan Cox
2002-09-27 18:35 ` [patch] 'virtual => physical page mapping cache',vcache-2.5.38-B8 Andrew Morton
2002-09-27 19:16 ` Alan Cox
2002-09-27 19:25 ` [patch] 'virtual => physical page mappingcache',vcache-2.5.38-B8 Andrew Morton
2002-09-27 20:02 ` Alan Cox
2002-09-28 10:22 ` Arjan van de Ven [this message]
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