From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Ingo Oeser <ioe-lkml@rameria.de>
Cc: Nick Piggin <npiggin@suse.de>, Carsten Otte <cotte.de@gmail.com>,
Linux Memory Management <linux-mm@kvack.org>,
Andrew Morton <akpm@osdl.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [patch 3/3] mm: fault handler to replace nopage and populate
Date: Sun, 15 Oct 2006 17:54:46 +1000 [thread overview]
Message-ID: <4531E946.5070503@yahoo.com.au> (raw)
In-Reply-To: <200610141528.50542.ioe-lkml@rameria.de>
Hi Ingo,
Ingo Oeser wrote:
> Hi Nick,
>
> On Thursday, 12. October 2006 14:07, Nick Piggin wrote:
>
>>Actually, filemap_xip needs some attention I think... if xip files
>>can be truncated or invalidated (I assume they can), then we need to
>>lock the page, validate that it is the correct one and not truncated,
>>and return with it locked.
>
>
> ???
>
> Isn't XIP for "eXecuting In Place" from ROM or FLASH?
Yes, I assume so. It seems that it isn't restricted to executing, but
is basically a terminology to mean that it bypasses the pagecache.
> How to truncate these? I thought the whole idea of
> XIP was a pure RO mapping?
Well, not filemap_xip.
>
> They should be valid from mount to umount.
>
> Regards
>
> Ingo Oeser, a bit puzzled about that...
See mm/filemap_xip.c:xip_file_write, xip_truncate_page.
Thanks,
Nick
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Ingo Oeser <ioe-lkml@rameria.de>
Cc: Nick Piggin <npiggin@suse.de>, Carsten Otte <cotte.de@gmail.com>,
Linux Memory Management <linux-mm@kvack.org>,
Andrew Morton <akpm@osdl.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [patch 3/3] mm: fault handler to replace nopage and populate
Date: Sun, 15 Oct 2006 17:54:46 +1000 [thread overview]
Message-ID: <4531E946.5070503@yahoo.com.au> (raw)
In-Reply-To: <200610141528.50542.ioe-lkml@rameria.de>
Hi Ingo,
Ingo Oeser wrote:
> Hi Nick,
>
> On Thursday, 12. October 2006 14:07, Nick Piggin wrote:
>
>>Actually, filemap_xip needs some attention I think... if xip files
>>can be truncated or invalidated (I assume they can), then we need to
>>lock the page, validate that it is the correct one and not truncated,
>>and return with it locked.
>
>
> ???
>
> Isn't XIP for "eXecuting In Place" from ROM or FLASH?
Yes, I assume so. It seems that it isn't restricted to executing, but
is basically a terminology to mean that it bypasses the pagecache.
> How to truncate these? I thought the whole idea of
> XIP was a pure RO mapping?
Well, not filemap_xip.
>
> They should be valid from mount to umount.
>
> Regards
>
> Ingo Oeser, a bit puzzled about that...
See mm/filemap_xip.c:xip_file_write, xip_truncate_page.
Thanks,
Nick
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
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next prev parent reply other threads:[~2006-10-15 7:54 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-07 13:05 [rfc] 2.6.19-rc1: vm stuff Nick Piggin
2006-10-07 13:05 ` Nick Piggin
2006-10-07 13:05 ` [patch 1/3] mm: arch_free_page fix Nick Piggin
2006-10-07 13:05 ` Nick Piggin
2006-10-07 13:05 ` [patch 2/3] mm: locks_freed fix Nick Piggin
2006-10-07 13:05 ` Nick Piggin
2006-10-07 13:06 ` [patch 3/3] mm: add arch_alloc_page Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 20:43 ` Andrew Morton
2006-10-07 20:43 ` Andrew Morton
2006-10-08 1:39 ` Nick Piggin
2006-10-08 1:39 ` Nick Piggin
2006-10-11 14:48 ` Martin Schwidefsky
2006-10-11 14:48 ` Martin Schwidefsky
2006-10-11 14:56 ` Nick Piggin
2006-10-11 14:56 ` Nick Piggin
2006-10-11 15:07 ` Martin Schwidefsky
2006-10-11 15:07 ` Martin Schwidefsky
2006-10-07 13:06 ` [patch 1/3] mm: fault vs invalidate/truncate check Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 13:06 ` [patch 2/3] mm: fault vs invalidate/truncate race fix Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 20:43 ` Andrew Morton
2006-10-07 20:43 ` Andrew Morton
2006-10-07 20:44 ` Andrew Morton
2006-10-07 20:44 ` Andrew Morton
2006-10-08 2:05 ` Nick Piggin
2006-10-08 2:05 ` Nick Piggin
2006-10-07 13:06 ` [patch 3/3] mm: fault handler to replace nopage and populate Nick Piggin
2006-10-07 13:06 ` Nick Piggin
2006-10-07 15:14 ` Jeff Garzik
2006-10-07 15:14 ` Jeff Garzik
2006-10-08 2:17 ` Nick Piggin
2006-10-08 2:17 ` Nick Piggin
2006-10-07 20:44 ` Andrew Morton
2006-10-07 20:44 ` Andrew Morton
2006-10-08 2:12 ` Nick Piggin
2006-10-08 2:12 ` Nick Piggin
2006-10-08 23:46 ` Benjamin Herrenschmidt
2006-10-08 23:46 ` Benjamin Herrenschmidt
2006-10-09 10:26 ` Nick Piggin
2006-10-09 10:26 ` Nick Piggin
2006-10-09 10:50 ` Benjamin Herrenschmidt
2006-10-09 10:50 ` Benjamin Herrenschmidt
2006-10-09 11:00 ` Nick Piggin
2006-10-09 11:00 ` Nick Piggin
2006-10-09 11:10 ` Benjamin Herrenschmidt
2006-10-09 11:10 ` Benjamin Herrenschmidt
2006-10-09 11:19 ` Nick Piggin
2006-10-09 11:19 ` Nick Piggin
2006-10-09 11:32 ` Benjamin Herrenschmidt
2006-10-09 11:32 ` Benjamin Herrenschmidt
2006-10-09 11:45 ` Nick Piggin
2006-10-09 11:45 ` Nick Piggin
2006-10-09 11:49 ` Benjamin Herrenschmidt
2006-10-09 11:49 ` Benjamin Herrenschmidt
2006-10-09 11:58 ` Nick Piggin
2006-10-09 11:58 ` Nick Piggin
2006-10-09 12:07 ` Benjamin Herrenschmidt
2006-10-09 12:07 ` Benjamin Herrenschmidt
2006-10-09 12:14 ` Nick Piggin
2006-10-09 12:14 ` Nick Piggin
2006-10-09 13:38 ` Thomas Hellstrom
2006-10-09 13:38 ` Thomas Hellstrom
2006-10-09 13:52 ` Nick Piggin
2006-10-09 13:52 ` Nick Piggin
2006-10-09 20:50 ` Benjamin Herrenschmidt
2006-10-09 20:50 ` Benjamin Herrenschmidt
2006-10-10 6:11 ` Thomas Hellström
2006-10-10 6:11 ` Thomas Hellström
2006-10-10 7:55 ` Benjamin Herrenschmidt
2006-10-10 7:55 ` Benjamin Herrenschmidt
2006-10-10 8:39 ` Thomas Hellstrom
2006-10-10 8:39 ` Thomas Hellstrom
2006-10-09 20:45 ` Benjamin Herrenschmidt
2006-10-09 20:45 ` Benjamin Herrenschmidt
2006-10-09 12:09 ` Nick Piggin
2006-10-09 12:09 ` Nick Piggin
2006-10-09 12:11 ` Benjamin Herrenschmidt
2006-10-09 12:11 ` Benjamin Herrenschmidt
2006-10-10 12:10 ` Christoph Hellwig
2006-10-10 12:10 ` Christoph Hellwig
2006-10-10 12:13 ` Nick Piggin
2006-10-10 12:13 ` Nick Piggin
2006-10-10 17:52 ` Andrew Morton
2006-10-10 17:52 ` Andrew Morton
2006-10-11 0:43 ` SPAM: " Nick Piggin
2006-10-11 0:43 ` Nick Piggin
[not found] ` <5c77e7070610120456t1bdaa95cre611080c9c953582@mail.gmail.com>
2006-10-12 12:07 ` Nick Piggin
2006-10-12 12:07 ` Nick Piggin
2006-10-14 13:28 ` Ingo Oeser
2006-10-14 13:28 ` Ingo Oeser
2006-10-15 7:54 ` Nick Piggin [this message]
2006-10-15 7:54 ` Nick Piggin
2006-10-24 21:31 ` Dave Airlie
2006-10-24 21:31 ` Dave Airlie
2006-10-26 11:09 ` Nick Piggin
2006-10-26 11:09 ` Nick Piggin
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