CVS commit: src/sys/dev

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Wed Jun 29 09:12:42 UTC 2011

Modified Files:
        src/sys/dev: vnd.c vndvar.h

Log Message:
Make vnd(4) work on sparse files:
- Make the strategy decision a device flag and set VNF_USE_VN_RDWR for
  files known to be sparse.
- Change handle_with_rdwr() to use POSIX_FADV_NOREUSE advise to disable
  read ahead and keep the size of mapped pages below 1 MByte.

No objections on tech-kern@.


To generate a diff of this commit:
cvs rdiff -u -r1.217 -r1.218 src/sys/dev/vnd.c
cvs rdiff -u -r1.30 -r1.31 src/sys/dev/vndvar.h

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