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ARM: dts: msm: Increase virtio-mem maximum size

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ZRAM is being disabled on tuivm due to observed stability issues due to
ZRAM's use of GFP_MEMALLOC. Increase maximum movable zone size to
compensate.

When kswapd swaps out pages, PF_MEMALLOC is set, which results in zram
ignoring the min_watermark, and lowmem_reserve. This is problematic
because we intend for movable memory to stay in ZONE_MOVABLE, rather
than falling back to ZONE_NORMAL. If the later occurs to such a high
degree that all ZONE_NORMAL memory is consumed, as is observed to be
the case during a "C2PA" testcase, attempts to plug in additional
ZONE_MOVABLE memory may fail due to requiring a small amount of
GFP_KERNEL memory.

Change-Id: Ic847e90514f80ccb91daa98849440d7a9b97f156
Signed-off-by: Patrick Daly <quic_pdaly@quicinc.com>
This commit is contained in:
Patrick Daly
2024-07-30 16:19:32 -07:00
parent efdc753321
commit cf2d1ea24d
1 changed files with 1 additions and 1 deletions
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2
qcom/sun-vm.dtsi
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@@ -716,7 +716,7 @@
compatible = "qcom,virtio-mem";
depends-on-supply = <&mem_buf_msgq>;
/* Must be memory_block_size_bytes() aligned */
qcom,max-size = <0x0 0x10000000>;
qcom,max-size = <0x0 0x18000000>;
qcom,ipa-range = <0x0 0x0 0xf 0xffffffff>;
qcom,block-size = <0x400000>;
qcom,initial-movable-zone-size = <0x2000000>;