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save: support bypass-cache flag in libvirt-guests init script

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libvirt-guests is a perfect use case for bypassing the file system
cache - lots of filesystem traffic done at system shutdown, where
caching is pointless, and startup, where reading large files only
once just gets in the way.  Make this a configurable option in the
init script, but defaulting to existing behavior.

* tools/libvirt-guests.sysconf (BYPASS_CACHE): New variable.
* tools/libvirt-guests.init.sh (start, suspend_guest): Use it.
This commit is contained in:
Eric Blake
2011-07-14 17:22:53 -06:00
parent a9f9545e12
commit 28d182506a
2 changed files with 13 additions and 2 deletions
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5
tools/libvirt-guests.sysconf
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@@ -25,3 +25,8 @@
# number of seconds we're willing to wait for a guest to shut down
#SHUTDOWN_TIMEOUT=0
# If non-zero, try to bypass the file system cache when saving and
# restoring guests, even though this may give slower operation for
# some file systems.
#BYPASS_CACHE=0