Maxim Sobolev wrote: > Maxime Henrion wrote: > > > > Maxim Sobolev wrote: > > > Any ideas? > > > > Looks like some other processes was modifying the mountlist while > > vfs_unmountall() was running. Is this an SMP box ? > > No, it's UP. > > > It would be nice if > > you could check in gdb which other process was holding the mountlist_mtx > > mutex if any. > > Sure, if you will provide me with instruction on how to do in.
You could know it by looking at the struct mtx, but after having read the stacktrace more carefully, I think my wild guesses were incorrect. I've seen a NULL mp pointer in the args and thought it was because of a corrupted mountlist but it seems it can't be that. devfs_unmount() gets called with a valid mp pointer and gdb tells us it then calls vflush() with a NULL mp, but devfs_unmount() just call vflush() with the same mp without modifying it. It looks like it's a bug in gdb and the bug is much more likely to be in vflush() like with the stacktraces from the bento cluster kris has been reporting. I expect this bug to be fixed with jeff's patch. I'm still unsure about how things are done in vfs_unmountall() but I doubt it could be the cause of your problems. Cheers, Maxime To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
