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ashmemashmemPosted Dec 21, 2011 12:37 UTC (Wed) by swetland (subscriber, #63414)In reply to: ashmem by josh Parent article: Bringing Android closer to the mainline
Yup -- that was the main limitation (not being able to get an fd to pass to another process for mapping) that ashmem was working around.
It also (though this feature came later) has functionality which allows a process to indicate ranges of pages which are not needed and may be reclaimed by the kernel in the event of a low memory situation. The idea being that using this to mark caches, etc, gives the kernel the ability to reclaim some pages as an alternative to invoking the low memory killer to obtain more memory in a pinch.
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