On Thu, Sep 11, 2008 at 09:48:42PM +0930, Brett Lymn wrote: > On Wed, Sep 10, 2008 at 09:58:22PM +0300, Stathis Kamperis wrote: > > > > Using kernels from Sunday and today, I'm seeing a panic involving > > > > kmem_poison_check on shutdown. This is using amd64 on a Thinkpad T61. > > > > Is anyone else seeing this? Sorry I don't have more details; I was > > > > concentrating more on testing if a particular PR had been resolved. > > > > > > > > > > > > --Steve Bellovin, http://www.cs.columbia.edu/~smb > > > > > > > > > > > > > I am seeing this also. It is triggered when unmounting mfs but I din't > > > pay close attention to it either. > > > > > > My system is NetBSD 4.99.72/i386, UP. > > > > > Yes, there does appear to be a problem with MFS - I have seen two > behaviours when shutting down the machine: > > 1) Machine panics with a bad memory reference in VFS_START+0x25 - > which looks to be the unlock of the mount point I tracked this down to vfs_destroy() being called one too many times. The struct mount gets freed and thus when VFS_START tries using it again the pointer is invalid. I haven't tried very hard to debug it further, this is a case of whatever printf you add will make the issue go away, but the point is that reference counting goes wrong. > 2) Machine just wedges - breaking to ddb just has it waiting on a lock I've never seen that one. -- Quentin Garnier - cube%cubidou.net@localhost - cube%NetBSD.org@localhost "See the look on my face from staying too long in one place [...] every time the morning breaks I know I'm closer to falling" KT Tunstall, Saving My Face, Drastic Fantastic, 2007.
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