Date: Thu, 9 Apr 1998 22:10:01 -0700 (PDT) From: David Greenman <dg@root.com> To: freebsd-bugs Subject: Re: kern/6258: FreeBSD-2.2.6 VM lockup on kernel map due to brelse calling bfreekva(), dump lockup in getnewbuf() due to fragmented buffer_map Message-ID: <199804100510.WAA14688@hub.freebsd.org>
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The following reply was made to PR kern/6258; it has been noted by GNATS.
From: David Greenman <dg@root.com>
To: dillon@best.net
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: kern/6258: FreeBSD-2.2.6 VM lockup on kernel map due to brelse calling bfreekva(), dump lockup in getnewbuf() due to fragmented buffer_map
Date: Thu, 09 Apr 1998 22:04:25 -0700
> Since we can't put the bfreekva() back into brelse(), my solution
> is to put code in getnewbuf(). If the vm_map_findspace() call
> fails, my proposed code (the second set of changes below) wipes
> the kvm mappings for all EMPTY bp's in an attempt to defragment it
> then retries the vm_map_findspace() call.
This is similar but different from the way it was fixed in -current. The
fix from -current should be adopted for -stable.
-DG
David Greenman
Core-team/Principal Architect, The FreeBSD Project
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