Date: Wed, 15 Dec 2004 22:20:22 +0000 (UTC) From: Paul Saab <ps@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/nfsclient nfs.h nfs_bio.c nfs_nfsiod.c nfs_vfsops.c nfs_vnops.c nfsnode.h Message-ID: <200412152220.iBFMKMKa081446@repoman.freebsd.org>
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ps 2004-12-15 22:20:22 UTC
FreeBSD src repository
Modified files:
sys/nfsclient nfs.h nfs_bio.c nfs_nfsiod.c nfs_vfsops.c
nfs_vnops.c nfsnode.h
Log:
First cut of NFS direct IO support.
- NFS direct IO completely bypasses the buffer and page caches.
If a file is open for direct IO all caching is disabled.
- Direct IO for Directories will be addressed later.
- 2 new NFS directio related sysctls are added. One is a knob to
disable NFS direct IO completely (direct IO is enabled by default).
The other is to disallow mmaped IO on a file that has at least one
O_DIRECT open (see the comment in nfs_vnops.c for more details).
The default is to allow mmaps on a file that has O_DIRECT opens.
Submitted by: Mohan Srinivasan mohans at yahoo-inc dot com
Obtained from: Yahoo!
Revision Changes Path
1.88 +2 -0 src/sys/nfsclient/nfs.h
1.145 +174 -0 src/sys/nfsclient/nfs_bio.c
1.84 +10 -4 src/sys/nfsclient/nfs_nfsiod.c
1.168 +1 -0 src/sys/nfsclient/nfs_vfsops.c
1.242 +39 -0 src/sys/nfsclient/nfs_vnops.c
1.52 +2 -0 src/sys/nfsclient/nfsnode.h
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