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Code Issues Releases Activity

Reduce kmem_arena maximum size for Armada38x

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VM_KMEM_SIZE_MAX allows to limit kmem arena size. In our case this was
necessary, as decreasing size of kmem_arena leaves more space for
kernel_arena.

kernel_arena is pool used for contigmalloc (in effect, DMA) allocations,
which failed on Armada38x. This resulted in 'no memory errors'
(e.g. USB_ERR_NOMEM errors) and failure of whole system. The need for
greater size of kernel_arena probably comes from more peripherals making
use of busdma.

Value used as upper limit is half of the default value
(0x1399a000).

Submitted by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: Stormshield
Differential revision: https://reviews.freebsd.org/D10216
This commit is contained in:
Zbigniew Bodek 2017-04-18 10:20:42 +00:00
parent 7ce9096841
commit c7df7863ae
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=317084
1 changed files with 2 additions and 0 deletions
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sys/arm/conf/ARMADA38X
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@ -21,6 +21,8 @@ options ROOTDEVNAME=\"/dev/da0s1a\"
options SCHED_ULE # ULE scheduler
options SMP
options VM_KMEM_SIZE_MAX=0x9CCD000
# Pseudo devices
device random
device pty