Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland | KernelTrap

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland

view
thread

!MAILaRCHIVE_VOTE_RePLACE

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

[view in full thread]

From: Pekka Enberg <penberg@...>

To: Hugh Dickins <hugh@...>

Cc: Ryan Finnie <ryan@...>, Andrew Morton <akpm@...>, Erez Zadok <ezk@...>, <linux-kernel@...>, <linux-fsdevel@...>, <cjwatson@...>, <linux-mm@...>

Subject: Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland

Date: Friday, October 12, 2007 - 5:45 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
-
unsubscribe noticeTo unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:

msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userland, Erez Zadok, (Sun Oct 7, 3:20 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Andrew Morton, (Thu Oct 11, 5:47 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Ryan Finnie, (Thu Oct 11, 6:12 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Thu Oct 11, 8:38 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka Enberg, (Fri Oct 12, 5:45 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Sun Oct 14, 4:44 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka Enberg, (Sun Oct 14, 1:09 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Sun Oct 14, 1:23 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Oct 22, 3:42 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Mon Oct 22, 5:38 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Thu Oct 25, 2:03 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Sun Oct 28, 4:23 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Oct 29, 4:33 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Wed Oct 31, 7:53 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Nov 5, 11:40 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Fri Nov 9, 2:05 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Nov 12, 1:01 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Tue Nov 13, 6:18 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Sat Nov 17, 5:24 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Mon Nov 19, 9:30 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Nov 12, 1:41 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Dave Hansen, (Mon Nov 5, 12:38 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Thu Nov 8, 10:47 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Nov 5, 2:57 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Sat Oct 27, 4:47 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka J Enberg, (Sun Oct 14, 1:50 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Sun Oct 14, 6:32 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Oct 22, 4:01 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka Enberg, (Mon Oct 22, 4:40 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka Enberg, (Mon Oct 15, 7:47 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Mon Oct 22, 4:16 pm)

[PATCH] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, Hugh Dickins, (Wed Oct 24, 5:02 pm)

Re: [PATCH] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, Andrew Morton, (Wed Oct 24, 5:08 pm)

[PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, Hugh Dickins, (Wed Oct 24, 5:37 pm)

Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, Pekka Enberg, (Thu Oct 25, 1:37 am)

Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, Hugh Dickins, (Thu Oct 25, 2:30 am)

Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE , Erez Zadok, (Thu Oct 25, 12:01 pm)

Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, H. Peter Anvin, (Thu Oct 25, 4:51 pm)

Re: [PATCH+comment] fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE, Pekka Enberg, (Thu Oct 25, 3:24 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Mon Oct 22, 5:04 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Thu Oct 25, 12:40 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka Enberg, (Mon Oct 22, 4:48 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Thu Oct 25, 11:36 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Pekka Enberg, (Fri Oct 26, 4:05 am)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Thu Oct 25, 12:44 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Hugh Dickins, (Thu Oct 25, 2:23 pm)

Re: msync(2) bug(?), returns AOP_WRITEPAGE_ACTIVATE to userl..., Erez Zadok, (Tue Oct 16, 2:02 pm)

Navigation

Popular discussions


linux-kernel:
Greg Kroah-Hartman	[PATCH 001/196] Chinese: Add the known_regression URI to the HOWTO
david	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
David Miller	Re: [RFC/PATCH] Documentation of kernel messages
Rafael J. Wysocki	Re: linux-next: Tree for June 13: IO APIC breakage on HP nx6325
git:

linux-netdev:
Josip Rodin	bnx2_poll panicking kernel
Frans Pop	svc: failed to register lockdv1 RPC service (errno 97).
Gerrit Renker	[PATCH 03/37] dccp: List management for new feature negotiation
Herbert Xu	Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
openbsd-misc:

Colocation donated by:

Who's online

There are currently 3 users and 851 guests online.

Online users

Syndicate