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ANDROID: dma-direct: Document disable_dma32

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Document the functionality of disable_dma32 as introduced in commit
c3c2bb34ac ("ANDROID: arm64/mm: Add command line option to make
ZONE_DMA32 empty").

Bug: 199917449
Signed-off-by: Chris Goldsworthy <quic_cgoldswo@quicinc.com>
Change-Id: I32ab2969f59fcc49e9ac49e7e6b545f816d120f9
This commit is contained in:
Chris Goldsworthy
2022-02-25 18:59:08 -08:00
committed by Suren Baghdasaryan
parent bf96382fb9
commit 135406cecb
1 changed files with 4 additions and 0 deletions
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4
Documentation/admin-guide/kernel-parameters.txt
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@@ -939,6 +939,10 @@
can be useful when debugging issues that require an SLB can be useful when debugging issues that require an SLB
miss to occur. miss to occur.
disable_dma32= [KNL]
Dynamically disable ZONE_DMA32 on kernels compiled with
CONFIG_ZONE_DMA32=y.
stress_slb [PPC] stress_slb [PPC]
Limits the number of kernel SLB entries, and flushes Limits the number of kernel SLB entries, and flushes
them frequently to increase the rate of SLB faults them frequently to increase the rate of SLB faults