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Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland
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From: Pekka Enberg
Subject:
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland
Date: Friday, October 12, 2007 - 2:45 pm
Hi Hugh, On 10/12/07, Hugh Dickins <hugh@veritas.com> wrote:
quoted text
> But I keep suspecting that the answer might be the patch below (which > rather follows what drivers/block/rd.c is doing). I'm especially > worried that, rather than just AOP_WRITEPAGE_ACTIVATE being returned > to userspace, bad enough in itself, you might be liable to hit that > BUG_ON(page_mapped(page)). shmem_writepage does not expect to be > called by anyone outside mm/vmscan.c, but unionfs can now get to it?
Doesn't msync(2) get to it via mm/page-writeback.c:write_cache_pages() without unionfs even? Pekka -
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Messages in current thread:
msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland
, Erez Zadok
, (Sun Oct 7, 12:20 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Andrew Morton
, (Thu Oct 11, 2:47 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Ryan Finnie
, (Thu Oct 11, 3:12 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Thu Oct 11, 5:38 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka Enberg
, (Fri Oct 12, 2:45 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Sun Oct 14, 1:44 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka Enberg
, (Sun Oct 14, 10:09 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Sun Oct 14, 10:23 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka J Enberg
, (Sun Oct 14, 10:50 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Sun Oct 14, 3:32 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka Enberg
, (Mon Oct 15, 4:47 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Tue Oct 16, 11:02 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Oct 22, 12:42 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Oct 22, 1:01 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Oct 22, 1:16 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka Enberg
, (Mon Oct 22, 1:40 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka Enberg
, (Mon Oct 22, 1:48 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Mon Oct 22, 2:04 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Mon Oct 22, 2:38 pm)
[PATCH] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Hugh Dickins
, (Wed Oct 24, 2:02 pm)
Re: [PATCH] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Andrew Morton
, (Wed Oct 24, 2:08 pm)
[PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Hugh Dickins
, (Wed Oct 24, 2:37 pm)
Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Pekka Enberg
, (Wed Oct 24, 10:37 pm)
Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Hugh Dickins
, (Wed Oct 24, 11:30 pm)
Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Pekka Enberg
, (Thu Oct 25, 12:24 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Thu Oct 25, 8:36 am)
Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, Erez Zadok
, (Thu Oct 25, 9:01 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Thu Oct 25, 9:40 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Thu Oct 25, 9:44 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Thu Oct 25, 11:03 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Thu Oct 25, 11:23 am)
Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE
, H. Peter Anvin
, (Thu Oct 25, 1:51 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Pekka Enberg
, (Fri Oct 26, 1:05 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Sat Oct 27, 1:47 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Sun Oct 28, 1:23 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Oct 29, 1:33 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Wed Oct 31, 4:53 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Nov 5, 8:40 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Dave Hansen
, (Mon Nov 5, 9:38 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Nov 5, 11:57 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Thu Nov 8, 7:47 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Thu Nov 8, 11:05 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Sun Nov 11, 10:41 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Mon Nov 12, 10:01 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Tue Nov 13, 3:18 am)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Hugh Dickins
, (Sat Nov 17, 2:24 pm)
Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to use ...
, Erez Zadok
, (Mon Nov 19, 6:30 pm)
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