Thread (27 messages) 27 messages, 4 authors, 2016-09-28

Re: [PATCH v5 0/6] Introduce ZONE_CMA

From: Aneesh Kumar K.V <hidden>
Date: 2016-08-30 10:39:51
Also in: lkml

Joonsoo Kim [off-list ref] writes:
2016-08-29 18:27 GMT+09:00 Aneesh Kumar K.V [off-list ref]:
quoted
js1304@gmail.com writes:
quoted
From: Joonsoo Kim <redacted>

Hello,

Changes from v4
o Rebase on next-20160825
o Add general fix patch for lowmem reserve
o Fix lowmem reserve ratio
o Fix zone span optimizaion per Vlastimil
o Fix pageset initialization
o Change invocation timing on cma_init_reserved_areas()
I don't see much information regarding how we interleave between
ZONE_CMA and other zones for movable allocation. Is that explained in
any of the patch ? The fair zone allocator got removed by
e6cbd7f2efb433d717af72aa8510a9db6f7a7e05
Interleaving would not work since the fair zone allocator policy is removed.
I don't think that it's a big problem because it is just matter of
timing to fill
up the memory. Eventually, memory on ZONE_CMA will be fully used in
any case.
Does that mean a CMA allocation will now be slower because in most case we
will need to reclaim ? The zone list will now have ZONE_CMA in the
beginning right ?

-aneesh

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