Date: Thu, 25 Feb 1999 02:09:24 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Luoqi Chen <luoqi@watermarkgroup.com>, dfr@nlsystems.com, freebsd-hackers@FreeBSD.ORG, mjacob@feral.com Subject: Re: Panic in FFS/4.0 as of yesterday - update Message-ID: <199902251009.CAA02488@apollo.backplane.com> References: <199902231444.JAA02311@lor.watermarkgroup.com> <199902231848.KAA51270@apollo.backplane.com> <199902250916.BAA02250@apollo.backplane.com>
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Ah. It looks like the numfreebuffers accounting is messed up as well.
I had a lockup with processes sitting in 'newbuf' after I added a hard
check/sleep based on 'numfreebuffers'.
test2:/home/dillon> sysctl -a | fgrep buffers
vfs.numdirtybuffers: 149
vfs.lodirtybuffers: 95
vfs.hidirtybuffers: 191
vfs.numfreebuffers: 16715 <----- actually, there were none
vfs.lofreebuffers: 81
vfs.hifreebuffers: 162
That could account for quite a bit, actually. It means getblk() wouldn't
block when it should.
-Matt
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