Re: [BUG] 2.6.24-rc3-mm2 kernel bug on nfs & cifs mounted partitions

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On Thu, 29 Nov 2007 14:30:14 +0530 Kamalesh Babulal <[email protected]> wrote:

> Hi Andrew,
> 
> While running file system stress on nfs and cifs mounted partitions, the machine
> drops to xmon
> 
> 1:mon> e
> cpu 0x1: Vector: 300 (Data Access) at [c000000080a9f880]
>     pc: c0000000001392c8: .inotify_inode_queue_event+0x50/0x158
>     lr: c0000000001074d0: .vfs_link+0x204/0x298
>     sp: c000000080a9fb00
>    msr: 8000000000009032
>    dar: 280 
>  dsisr: 40010000
>   current = 0xc0000000c8e6f670
>   paca    = 0xc000000000512c00
>     pid   = 2848, comm = fsstress
> 1:mon> t
> [c000000080a9fbd0] c0000000001074d0 .vfs_link+0x204/0x298
> [c000000080a9fc70] c00000000010b6e0 .sys_linkat+0x134/0x1b4
> [c000000080a9fe30] c00000000000872c syscall_exit+0x0/0x40
> --- Exception: c00 (System Call) at 000000000ff1bdfc
> SP (ffeaed10) is in userspace
> 1:mon> r
> R00 = c0000000001074d0   R16 = 0000000000000000
> R01 = c000000080a9fb00   R17 = 0000000000000000
> R02 = c00000000060c380   R18 = 0000000000000000
> R03 = 0000000000000000   R19 = 0000000000000000
> R04 = 0000000000000004   R20 = 0000000000000000
> R05 = 0000000000000000   R21 = 0000000000000000
> R06 = 0000000000000000   R22 = 0000000000000000
> R07 = 0000000000000000   R23 = 0000000000000004
> R08 = 0000000000000000   R24 = 0000000000000280
> R09 = 0000000000000000   R25 = fffffffffffff000
> R10 = 0000000000000001   R26 = c000000082827790
> R11 = c0000000003963e8   R27 = c0000000828275a0
> R12 = d000000000deec78   R28 = 0000000000000000
> R13 = c000000000512c00   R29 = c00000007b18fcf0
> R14 = 0000000000000000   R30 = c0000000005bc088
> R15 = 0000000000000000   R31 = 0000000000000000
> pc  = c0000000001392c8 .inotify_inode_queue_event+0x50/0x158
> lr  = c0000000001074d0 .vfs_link+0x204/0x298
> msr = 8000000000009032   cr  = 24000882
> ctr = c0000000003963e8   xer = 0000000000000000   trap =  300 
> dar = 0000000000000280   dsisr = 40010000
> 
> 
> The gdb output shows 
> 
> 0xc0000000001076d4 is in vfs_symlink (include/linux/fsnotify.h:108).
> 103      * fsnotify_create - 'name' was linked in
> 104      */  
> 105     static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
> 106     {   
> 107             inode_dir_notify(inode, DN_CREATE);
> 108             inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
> 109                                       dentry->d_inode);
> 110             audit_inode_child(dentry->d_name.name, dentry, inode);
> 111     }   
> 112
> 

If it is reproducible can you please try reverting
inotify-send-in_attrib-events-when-link-count-changes.patch?
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