Date: Fri, 24 Jun 2005 16:08:03 +1000 From: Stephen McKay <smckay@internode.on.net> To: stable@freebsd.org Cc: Stephen McKay <smckay@internode.on.net> Subject: VFS_BIO_DEBUG and 4.11 Message-ID: <200506240608.j5O683ul026404@dungeon.home>
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Hi-diddly-ho! Is VFS_BIO_DEBUG still supposed to work in 4.11? I'm trying to debug a data corruption problem that could be a bug in the cd9660 file system and thought that enabling VFS_BIO_DEBUG might help. Instead it complains a lot about directories and character devices being VMIO'd nowadays, then panics with "biodone: zero vnode ref count" before it even finishes booting. I have reason to believe this was a useful flag back in 4.4 (because I saw a kernel config from Matt Dillon that included it), but have not found any evidence of use more recent than that. So, is it obsolete now? Or is it just only a little bit broken? I don't (yet) understand the invariants it is trying to enforce, so perhaps none of them apply any more. Stephen.
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