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    DateThu, 29 Nov 2007 01:09:06 -0800
    FromAndrew Morton <>
    SubjectRe: [BUG] 2.6.24-rc3-mm2 kernel bug on nfs & cifs mounted partitions
    On Thu, 29 Nov 2007 14:30:14 +0530 Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> 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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