Date: Tue, 4 Mar 2003 13:35:28 -0800 (PST) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern vfs_cluster.c Message-ID: <200303042135.h24LZSZB064526@repoman.freebsd.org>
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jeff 2003/03/04 13:35:28 PST
FreeBSD src repository
Modified files:
sys/kern vfs_cluster.c
Log:
- Hold the buf lock while manipulating and inspecting its fields.
- Use gbincore() and not incore() so that we can drop the vnode interlock
as we acquire the buflock.
- Use GB_LOCK_NOWAIT when getting bufs for read ahead clusters so that we
don't block on locked bufs.
- Convert a while loop to a howmany() that will most likely be faster on
modern processors. There is another while loop divide that was left
near by because it is operating on a 64bit int and is most likely faster.
- Cleanup the cluster_read() code a little to get rid of a goto and make
the logic clearer.
Tested on: x86, alpha
Tested by: Steve Kargl <sgk@troutmask.apl.washington.edu>
Reviewd by: arch
Revision Changes Path
1.131 +70 -56 src/sys/kern/vfs_cluster.c
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