Re: [PATCH 0/5] Volatile Ranges (v12) & LSF-MM discussion fodder

[Dave Hansen]

On 04/02/2014 10:18 AM, Johannes Weiner wrote:
> Hence my follow-up question in the other mail about how large we
> expect such code caches to become in practice in relationship to
> overall system memory.  Are code caches interesting reclaim candidates
> to begin with?  Are they big enough to make the machine thrash/swap
> otherwise?

A big chunk of the use cases here are for swapless systems anyway, so
this is the *only* way for them to reclaim anonymous memory.  Their
choices are either to be constantly throwing away and rebuilding these
objects, or to leave them in memory effectively pinned.

In practice I did see ashmem (the Android thing that we're trying to
replace) get used a lot by the Android web browser when I was playing
with it.  John said that it got used for storing decompressed copies of
images.
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