Module Name:	syssrc
Committed By:	chs
Date:		Mon Jan  8 07:05:48 UTC 2001

Modified Files:
	syssrc/sys/kern: vfs_subr.c

Log Message:
in vtruncbuf(), use a "synchronous freeing" flush to prevent a race
between write i/os in a disk-based filesystem vs. the disk block being
freed by a truncation, allocated to a new file, and written again with
different data.  if the disk driver reorders the requests and does
the second i/o first, the old data will clobber the new, corrupting
the new file.


To generate a diff of this commit:
cvs rdiff -r1.143 -r1.144 syssrc/sys/kern/vfs_subr.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.