Date: Thu, 29 Apr 1999 11:15:28 -0700 (PDT) From: Alan Cox <alc@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern vfs_bio.c Message-ID: <199904291815.LAA07201@freefall.freebsd.org>
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alc 1999/04/29 11:15:28 PDT
Modified files:
sys/kern vfs_bio.c
Log:
Address a performance problem in getnewbuf:
In heavy-writing situations, QUEUE_LRU can contain a large number
of DELWRI buffers at its head. These buffers must be moved
to the tail if they cannot be written async in order to reduce
the scanning time required to skip past these buffers in later
getnewbuf() calls.
Submitted by: Matthew Dillon <dillon@apollo.backplane.com>
Revision Changes Path
1.207 +33 -5 src/sys/kern/vfs_bio.c
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