Messages in this thread | | | Date | Tue, 15 Sep 2015 09:49:57 +0900 | From | Sergey Senozhatsky <> | Subject | Re: [PATCH 0/3] allow zram to use zbud as underlying allocator |
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On (09/14/15 15:49), Vitaly Wool wrote: > While using ZRAM on a small RAM footprint devices, together with KSM, > I ran into several occasions when moving pages from compressed swap back > into the "normal" part of RAM caused significant latencies in system operation. > By using zbud I lose in compression ratio but gain in determinism, lower > latencies and lower fragmentation, so in the coming patches I tried to > generalize what I've done to enable zbud for zram so far. >
do you have CONFIG_PGTABLE_MAPPING enabled or disabled? or kmap_atomic/memcpy/kunmap_atomic is not the root cause here? can you provide more details please?
-ss
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