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docs: Specify that cache-clean-interval is only supported in Linux 

Make it clear that having Linux is a hard requirement for this
feature.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alberto Garcia 2016-11-25 13:27:46 +02:00 committed by Kevin Wolf
parent a8b99dd516
commit 8f57758311
1 changed files with 3 additions and 2 deletions
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5
docs/qcow2-cache.txt
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@ -160,5 +160,6 @@ If unset, the default value for this parameter is 0 and it disables
this feature. this feature.
Note that this functionality currently relies on the MADV_DONTNEED Note that this functionality currently relies on the MADV_DONTNEED
argument for madvise() to actually free the memory, so it is not argument for madvise() to actually free the memory. This is a
useful in systems that don't follow that behavior. Linux-specific feature, so cache-clean-interval is not supported in
other systems.