Date: Sun, 21 May 1995 14:39:33 -0700 From: David Greenman <davidg> To: CVS-commiters, cvs-sys Subject: cvs commit: src/sys/vm vm_object.c vm_pageout.c Message-ID: <199505212139.OAA29238@freefall.cdrom.com>
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davidg 95/05/21 14:39:32
Modified: sys/kern vfs_bio.c vfs_subr.c vfs_syscalls.c
sys/nfs nfs_bio.c
sys/sys mount.h
sys/ufs/ffs ffs_vnops.c
sys/vm vm_object.c vm_pageout.c
Log:
Changes to fix the following bugs:
1) Files weren't properly synced on filesystems other than UFS. In some
cases, this lead to lost data. Most likely would be noticed on NFS.
The fix is to make the VM page sync/object_clean general rather than
in each filesystem.
2) Mixing regular and mmaped file I/O on NFS was very broken. It caused
chunks of files to end up as zeroes rather than the intended contents.
The fix was to fix several race conditions and to kludge up the
"b_dirtyoff" and "b_dirtyend" that NFS relies upon - paying attention
to page modifications that occurred via the mmapping.
Reviewed by: David Greenman
Submitted by: John Dyson
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