From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>,
Linux Memory Management <linux-mm@kvack.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear)
Date: Wed, 07 Mar 2007 11:05:48 +0100 [thread overview]
Message-ID: <1173261949.9349.37.camel@localhost.localdomain> (raw)
In-Reply-To: <20070306225101.f393632c.akpm@linux-foundation.org>
> > NOPAGE_REFAULT is removed. This should be implemented with ->fault, and
> > no users have hit mainline yet.
>
> Did benh agree with that?
I won't use NOPAGE_REFAULT, I use NOPFN_REFAULT and that has hit
mainline. I will switch to ->fault when I have time to adapt the code,
in the meantime, NOPFN_REFAULT should stay.
Note that one thing we really want with the new ->fault (though I
haven't looked at the patches lately to see if it's available) is to be
able to differenciate faults coming from userspace from faults coming
from the kernel. The major difference is that the former can be
re-executed to handle signals, the later can't. Thus waiting in the
fault handler can be made interruptible in the former case, not in the
later case.
Ben.
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next prev parent reply other threads:[~2007-03-07 10:05 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-21 4:49 [patch 0/6] fault vs truncate/invalidate race fix Nick Piggin
2007-02-21 4:49 ` [patch 1/6] mm: debug check for the fault vs invalidate race Nick Piggin
2007-02-21 4:49 ` [patch 2/6] mm: simplify filemap_nopage Nick Piggin
2007-02-21 4:50 ` [patch 3/6] mm: fix fault vs invalidate race for linear mappings Nick Piggin
2007-03-07 6:36 ` Andrew Morton
2007-03-07 6:57 ` Nick Piggin
2007-03-07 7:08 ` Andrew Morton
2007-03-07 7:25 ` Nick Piggin
2007-02-21 4:50 ` [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear) Nick Piggin
2007-03-07 6:51 ` Andrew Morton
2007-03-07 7:08 ` Nick Piggin
2007-03-07 8:19 ` Nick Piggin
2007-03-07 8:27 ` Ingo Molnar
2007-03-07 8:35 ` Andrew Morton
2007-03-07 8:53 ` Ingo Molnar
2007-03-07 9:28 ` Nick Piggin
2007-03-07 9:44 ` Bill Irwin
2007-03-07 9:49 ` Nick Piggin
2007-03-07 10:02 ` Nick Piggin
2007-03-12 23:01 ` Blaisorblade
2007-03-13 1:19 ` Nick Piggin
2007-03-17 12:17 ` Blaisorblade
2007-03-18 2:50 ` Nick Piggin
2007-03-18 13:09 ` Jeff Dike
2007-03-19 12:04 ` Bill Irwin
2007-03-19 20:44 ` Blaisorblade
2007-03-20 6:00 ` Nick Piggin
2007-03-21 19:45 ` Blaisorblade
2007-03-08 12:39 ` Blaisorblade
2007-03-07 9:29 ` Bill Irwin
2007-03-07 9:39 ` Andrew Morton
2007-03-07 10:09 ` Bill Irwin
2007-03-07 8:38 ` Miklos Szeredi
2007-03-07 8:47 ` Andrew Morton
2007-03-07 8:51 ` Miklos Szeredi
2007-03-07 9:07 ` Andrew Morton
2007-03-07 9:18 ` Nick Piggin
2007-03-07 9:26 ` Andrew Morton
2007-03-07 9:28 ` Miklos Szeredi
2007-03-07 9:38 ` Nick Piggin
2007-03-07 9:25 ` Miklos Szeredi
2007-03-07 9:32 ` Peter Zijlstra
2007-03-07 9:45 ` Nick Piggin
2007-03-07 10:04 ` Nick Piggin
2007-03-07 10:06 ` Peter Zijlstra
2007-03-07 10:13 ` Miklos Szeredi
2007-03-07 10:21 ` Nick Piggin
2007-03-07 10:24 ` Peter Zijlstra
2007-03-07 10:38 ` Nick Piggin
2007-03-07 10:47 ` Peter Zijlstra
2007-03-07 11:00 ` Nick Piggin
2007-03-07 11:48 ` Peter Zijlstra
2007-03-07 12:17 ` Nick Piggin
2007-03-07 12:41 ` Peter Zijlstra
2007-03-07 13:08 ` Nick Piggin
2007-03-07 13:19 ` Peter Zijlstra
2007-03-07 13:36 ` Nick Piggin
2007-03-07 13:52 ` Peter Zijlstra
2007-03-07 13:56 ` Miklos Szeredi
2007-03-07 14:34 ` Peter Zijlstra
2007-03-07 15:01 ` Nick Piggin
2007-03-07 16:58 ` [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas Peter Zijlstra
2007-03-07 18:00 ` Linus Torvalds
2007-03-07 18:12 ` Peter Zijlstra
2007-03-07 18:24 ` Peter Zijlstra
2007-03-08 11:21 ` Miklos Szeredi
2007-03-08 11:37 ` Peter Zijlstra
2007-03-08 11:48 ` Miklos Szeredi
2007-03-08 12:11 ` Peter Zijlstra
2007-03-08 12:19 ` Nick Piggin
2007-03-08 12:25 ` Miklos Szeredi
2007-03-08 11:58 ` Nick Piggin
2007-03-08 12:09 ` Miklos Szeredi
2007-03-07 15:10 ` [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear) Jeff Dike
2007-03-07 13:53 ` Miklos Szeredi
2007-03-07 14:50 ` Nick Piggin
2007-03-07 12:22 ` Bill Irwin
2007-03-07 12:36 ` Nick Piggin
2007-03-07 10:30 ` [rfc][patch 7/6] mm: merge page_mkwrite Nick Piggin
2007-03-07 8:59 ` [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear) Nick Piggin
2007-03-07 9:11 ` Nick Piggin
2007-03-07 9:22 ` Ingo Molnar
2007-03-07 9:32 ` Bill Irwin
2007-03-07 9:35 ` Ingo Molnar
2007-03-07 9:50 ` Bill Irwin
2007-03-07 9:52 ` Nick Piggin
2007-03-07 7:19 ` Bill Irwin
2007-03-07 10:05 ` Benjamin Herrenschmidt [this message]
2007-03-07 10:17 ` Nick Piggin
2007-03-07 10:46 ` Benjamin Herrenschmidt
2007-02-21 4:50 ` [patch 5/6] mm: merge nopfn into fault Nick Piggin
2007-02-21 5:13 ` Nick Piggin
2007-02-21 4:50 ` [patch 6/6] mm: remove legacy cruft Nick Piggin
2007-02-27 4:36 ` [patch 0/6] fault vs truncate/invalidate race fix Dave Airlie
2007-02-27 5:32 ` Andrew Morton
2007-02-27 6:26 ` Dave Airlie
2007-02-27 6:54 ` Benjamin Herrenschmidt
2007-03-18 23:13 ` Dave Airlie
2007-02-27 8:50 ` Nick Piggin
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