Re: [PATCH 24/25] r/o bind mounts: track number of mount writers | KernelTrap

Re: [PATCH 24/25] r/o bind mounts: track number of mount writers

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From: Andrew Morton <akpm@...>

To: Dave Hansen <haveblue@...>

Cc: <linux-kernel@...>, <hch@...>

Subject: Re: [PATCH 24/25] r/o bind mounts: track number of mount writers

Date: Monday, September 24, 2007 - 7:15 pm

On Mon, 24 Sep 2007 16:05:37 -0700
Dave Hansen <haveblue@us.ibm.com> wrote:

quoted text> On Mon, 2007-09-24 at 15:25 -0700, Andrew Morton wrote:
> > hm.  I saw that warning on my 2-way.  It has CONFIG_NR_CPUS=8 so perhaps
> > the kernel has decided that this machine can possibly have eight CPUs.
> > 
> > It's an old super-micro board, doesn't have ACPI.
> 
> Well, it's looking like we only set cpu_possible_map from data we find
> in the MP table, which makes sense.  The only question is how your
> system gets more than ~8 possible cpus.  Do you have the .config handy?
> 

http://userweb.kernel.org/~akpm/config-vmm.txt
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Messages in current thread:

[PATCH 00/25] Read-only bind mounts, Dave Hansen, (Thu Sep 20, 3:52 pm)

[PATCH 24/25] r/o bind mounts: track number of mount writers, Dave Hansen, (Thu Sep 20, 3:53 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Christoph Hellwig, (Mon Sep 24, 1:54 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Dave Hansen, (Mon Sep 24, 3:28 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Andrew Morton, (Mon Sep 24, 3:42 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Dave Hansen, (Mon Oct 1, 2:06 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Andrew Morton, (Mon Sep 24, 3:10 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Christoph Hellwig, (Mon Sep 24, 3:24 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Andrew Morton, (Mon Sep 24, 2:17 am)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Dave Hansen, (Mon Sep 24, 6:06 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Andrew Morton, (Mon Sep 24, 6:25 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Dave Hansen, (Mon Sep 24, 7:05 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Andrew Morton, (Mon Sep 24, 7:15 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Dave Hansen, (Tue Sep 25, 12:10 pm)

Re: [PATCH 24/25] r/o bind mounts: track number of mount wri..., Arjan van de Ven, (Mon Sep 24, 10:34 am)

[PATCH 25/25] honor r/w changes at do_remount() time, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 23/25] do_rmdir(): elevate write count, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 22/25] elevate mnt writers for vfs_unlink() callers, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 21/25] sys_mknodat(): elevate write count for vfs_mkn..., Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 13/25] elevate mount count for extended attributes, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 06/25] elevate write count open()'d files, Dave Hansen, (Thu Sep 20, 3:52 pm)

Re: [PATCH 06/25] elevate write count open()'d files, Andrew Morton, (Wed Nov 28, 4:41 am)

Re: [PATCH 06/25] elevate write count open()'d files, Dave Hansen, (Wed Nov 28, 1:33 pm)

[PATCH 20/25] elevate write count for do_sys_utime() and tou..., Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 19/25] elevate write count for do_utimes(), Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 18/25] elevate writer count for do_sys_truncate(), Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 14/25] elevate write count for file_update_time(), Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 17/25] nfs: check mnt instead of superblock directly, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 02/25] rearrange may_open() to be r/o friendly, Dave Hansen, (Thu Sep 20, 3:52 pm)

[PATCH 16/25] elevate write count over calls to vfs_rename(), Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 15/25] unix_find_other() elevate write count for touc..., Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 10/25] elevate mnt writers for callers of vfs_mkdir(), Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 07/25] r/o bind mounts: elevate write count for some ..., Dave Hansen, (Thu Sep 20, 3:52 pm)

Re: [PATCH 07/25] r/o bind mounts: elevate write count for s..., Andrew Morton, (Fri Sep 21, 7:03 pm)

Re: [PATCH 07/25] r/o bind mounts: elevate write count for s..., Dave Hansen, (Fri Sep 21, 7:39 pm)

Re: [PATCH 07/25] r/o bind mounts: elevate write count for s..., Andrew Morton, (Fri Sep 21, 7:47 pm)

Re: [PATCH 07/25] r/o bind mounts: elevate write count for s..., Andrew Morton, (Fri Sep 21, 4:17 am)

[RFC] detect missed mnt_want_write() calls, Dave Hansen, (Tue Sep 25, 9:34 pm)

Re: [PATCH 07/25] r/o bind mounts: elevate write count for s..., Dave Hansen, (Fri Sep 21, 5:15 pm)

[PATCH 08/25] elevate writer count for chown and friends, Dave Hansen, (Thu Sep 20, 3:52 pm)

[PATCH 12/25] elevate write count for link and symlink calls, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 11/25] elevate write count during entire ncp_ioctl(), Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 09/25] make access() use mnt check, Dave Hansen, (Thu Sep 20, 3:53 pm)

[PATCH 05/25] r/o bind mounts: stub functions, Dave Hansen, (Thu Sep 20, 3:52 pm)

[PATCH 04/25] create cleanup helper svc_msnfs(), Dave Hansen, (Thu Sep 20, 3:52 pm)

[PATCH 03/25] give may_open() a local 'mnt' variable, Dave Hansen, (Thu Sep 20, 3:52 pm)

Re: [PATCH 03/25] give may_open() a local 'mnt' variable, Christoph Hellwig, (Thu Sep 20, 3:57 pm)

[PATCH 01/25] filesystem helpers for custom 'struct file's, Dave Hansen, (Thu Sep 20, 3:52 pm)

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