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qcow2: Set the default cache-clean-interval to 10 minutes

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The default cache-clean-interval is set to 10 minutes, in order to lower
the overhead of the qcow2 caches (before the default was 0, i.e.
disabled).

* For non-Linux platforms the default is kept at 0, because
  cache-clean-interval is not supported there yet.

Signed-off-by: Leonid Bloch <lbloch@janustech.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Leonid Bloch 2018-09-26 19:04:46 +03:00 • committed by Kevin Wolf
parent 45b4949c7b
commit e957b50b8d
5 changed files with 9 additions and 6 deletions
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4
docs/qcow2-cache.txt
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@ -210,8 +210,8 @@ This example removes all unused cache entries every 15 minutes:
-drive file=hd.qcow2,cache-clean-interval=900
If unset, the default value for this parameter is 0 and it disables
this feature.
If unset, the default value for this parameter is 600. Setting it to 0
disables this feature.
Note that this functionality currently relies on the MADV_DONTNEED
argument for madvise() to actually free the memory. This is a