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CA-52663/SCTX-581 -- vncscreenshot now takes screenshots of blank screens #36

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Mar 7, 2011

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... instead of waiting for a non-blank screen. This seems the opposite of what we want, but there have been reports of people repeatedly taking thousands of screenshots, all of which block while waiting for a non-blank screen, causing the host to run out of memory from all the blocked processes.

snapshot processes and can lead to OOM in dom

Added --allowblank option to vncsnaphot command. Now vncsnapshot will
return all-blank images immediately, instead of blocking until the
guest wakes up (which could be indefinite).

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
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