Date: Mon, 27 Mar 2000 13:29:34 -0800 (PST) From: Matt Dillon <dillon@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha machdep.c src/sys/i386/i386 machdep.c src/sys/kern vfs_bio.c src/sys/msdosfs msdosfs_vfsops.c src/sys/sys param.h Message-ID: <200003272129.NAA67748@freefall.freebsd.org>
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dillon 2000/03/27 13:29:34 PST
Modified files:
sys/alpha/alpha machdep.c
sys/i386/i386 machdep.c
sys/kern vfs_bio.c
sys/msdosfs msdosfs_vfsops.c
sys/sys param.h
Log:
Commit the buffer cache cleanup patch to 4.x and 5.x. This patch fixes a
fragmentation problem due to geteblk() reserving too much space for the
buffer and imposes a larger granularity (16K) on KVA reservations for
the buffer cache to avoid fragmentation issues. The buffer cache size
calculations have been redone to simplify them (fewer defines, better
comments, less chance of running out of KVA).
The geteblk() fix solves a performance problem that DG was able reproduce.
This patch does not completely fix the KVA fragmentation problems, but
it goes a long way
Mostly Reviewed by: bde and others
Approved by: jkh
Revision Changes Path
1.70 +15 -4 src/sys/alpha/alpha/machdep.c
1.387 +25 -3 src/sys/i386/i386/machdep.c
1.246 +139 -199 src/sys/kern/vfs_bio.c
1.61 +4 -2 src/sys/msdosfs/msdosfs_vfsops.c
1.63 +23 -14 src/sys/sys/param.h
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