Re: [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear) | KernelTrap

Re: [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear)

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From: Nick Piggin <npiggin@...>

To: Miklos Szeredi <miklos@...>

Cc: <a.p.zijlstra@...>, <akpm@...>, <mingo@...>, <linux-mm@...>, <linux-kernel@...>, <benh@...>

Subject: Re: [patch 4/6] mm: merge populate and nopage into fault (fixes nonlinear)

Date: Wednesday, March 7, 2007 - 6:21 am

On Wed, Mar 07, 2007 at 11:13:20AM +0100, Miklos Szeredi wrote:
quoted text> > *sigh* yes was looking at all that code, thats gonna be darn slow
> > though, but I'll whip up a patch.
> 
> Well, if it's going to be darn slow, maybe it's better to go with
> mingo's plan on emulating nonlinear vmas with linear ones.  That'll be

There are real users who want these fast, though.

quoted text> darn slow as well, but at least it will be much less complicated.

IMO, the best thing to do is just restore msync behaviour, and comment
the fact that we ignore nonlinears. We need to restore msync behaviour
to fix races in regular mappings anyway, at least for now.

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Messages in current thread:

[patch 0/6] fault vs truncate/invalidate race fix, Nick Piggin, (Wed Feb 21, 12:49 am)

Re: [patch 0/6] fault vs truncate/invalidate race fix, Dave Airlie, (Tue Feb 27, 12:36 am)

Re: [patch 0/6] fault vs truncate/invalidate race fix, Andrew Morton, (Tue Feb 27, 1:32 am)

Re: [patch 0/6] fault vs truncate/invalidate race fix, Nick Piggin, (Tue Feb 27, 4:50 am)

Re: [patch 0/6] fault vs truncate/invalidate race fix, Dave Airlie, (Tue Feb 27, 2:26 am)

Re: [patch 0/6] fault vs truncate/invalidate race fix, Benjamin Herrenschmidt, (Tue Feb 27, 2:54 am)

Re: [patch 0/6] fault vs truncate/invalidate race fix, Dave Airlie, (Sun Mar 18, 7:13 pm)

[patch 4/6] mm: merge populate and nopage into fault (fixes ..., Nick Piggin, (Wed Feb 21, 12:50 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Andrew Morton, (Wed Mar 7, 2:51 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Benjamin Herrenschmidt, (Wed Mar 7, 6:05 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 6:17 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Benjamin Herrenschmidt, (Wed Mar 7, 6:46 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 3:19 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 3:08 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 4:19 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Ingo Molnar, (Wed Mar 7, 4:27 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 4:59 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Ingo Molnar, (Wed Mar 7, 5:22 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:52 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 5:32 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Ingo Molnar, (Wed Mar 7, 5:35 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 5:50 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:11 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 4:38 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Andrew Morton, (Wed Mar 7, 4:47 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 4:51 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Andrew Morton, (Wed Mar 7, 5:07 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 5:32 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:45 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 6:04 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 6:06 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 6:13 am)

[rfc][patch 7/6] mm: merge page_mkwrite, Nick Piggin, (Wed Mar 7, 6:30 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 6:21 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 6:24 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 6:38 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 6:47 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 7:00 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 8:22 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 8:36 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 7:48 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 8:17 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 8:41 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 9:08 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 9:19 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 9:36 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 9:53 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 10:50 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 9:52 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Jeff Dike, (Wed Mar 7, 11:10 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Peter Zijlstra, (Wed Mar 7, 10:34 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 11:01 am)

[RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Peter Zijlstra, (Wed Mar 7, 12:58 pm)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Miklos Szeredi, (Thu Mar 8, 7:21 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Nick Piggin, (Thu Mar 8, 7:58 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Miklos Szeredi, (Thu Mar 8, 8:09 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Peter Zijlstra, (Thu Mar 8, 7:37 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Miklos Szeredi, (Thu Mar 8, 7:48 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Peter Zijlstra, (Thu Mar 8, 8:11 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Nick Piggin, (Thu Mar 8, 8:19 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Miklos Szeredi, (Thu Mar 8, 8:25 am)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Linus Torvalds, (Wed Mar 7, 2:00 pm)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Peter Zijlstra, (Wed Mar 7, 2:12 pm)

Re: [RFC][PATCH] mm: fix page_mkclean() vs non-linear vmas, Peter Zijlstra, (Wed Mar 7, 2:24 pm)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 9:56 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 5:25 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:18 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Andrew Morton, (Wed Mar 7, 5:26 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:38 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Miklos Szeredi, (Wed Mar 7, 5:28 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Andrew Morton, (Wed Mar 7, 4:35 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 5:29 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Andrew Morton, (Wed Mar 7, 5:39 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 6:09 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Ingo Molnar, (Wed Mar 7, 4:53 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:28 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Wed Mar 7, 5:44 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Blaisorblade, (Thu Mar 8, 8:39 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 5:49 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Wed Mar 7, 6:02 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Blaisorblade, (Mon Mar 12, 7:01 pm)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Mon Mar 12, 9:19 pm)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Blaisorblade, (Sat Mar 17, 8:17 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Sat Mar 17, 10:50 pm)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Blaisorblade, (Mon Mar 19, 4:44 pm)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Nick Piggin, (Tue Mar 20, 2:00 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Blaisorblade, (Wed Mar 21, 3:45 pm)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Bill Irwin, (Mon Mar 19, 8:04 am)

Re: [patch 4/6] mm: merge populate and nopage into fault (fi..., Jeff Dike, (Sun Mar 18, 9:09 am)

[patch 6/6] mm: remove legacy cruft, Nick Piggin, (Wed Feb 21, 12:50 am)

[patch 5/6] mm: merge nopfn into fault, Nick Piggin, (Wed Feb 21, 12:50 am)

Re: [patch 5/6] mm: merge nopfn into fault, Nick Piggin, (Wed Feb 21, 1:13 am)

[patch 3/6] mm: fix fault vs invalidate race for linear mapp..., Nick Piggin, (Wed Feb 21, 12:50 am)

Re: [patch 3/6] mm: fix fault vs invalidate race for linear ..., Andrew Morton, (Wed Mar 7, 2:36 am)

Re: [patch 3/6] mm: fix fault vs invalidate race for linear ..., Nick Piggin, (Wed Mar 7, 2:57 am)

Re: [patch 3/6] mm: fix fault vs invalidate race for linear ..., Andrew Morton, (Wed Mar 7, 3:08 am)

Re: [patch 3/6] mm: fix fault vs invalidate race for linear ..., Nick Piggin, (Wed Mar 7, 3:25 am)

[patch 2/6] mm: simplify filemap_nopage, Nick Piggin, (Wed Feb 21, 12:49 am)

[patch 1/6] mm: debug check for the fault vs invalidate race, Nick Piggin, (Wed Feb 21, 12:49 am)

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