Date: Fri, 17 Sep 2010 07:36:32 +0000 (UTC) From: Andriy Gapon <avg@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/amd64/include vmparam.h Message-ID: <201009170736.o8H7an5Q052169@repoman.freebsd.org>
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avg 2010-09-17 07:36:32 UTC
FreeBSD src repository
Modified files:
sys/amd64/include vmparam.h
Log:
SVN rev 212784 on 2010-09-17 07:36:32Z by avg
amd64: reduce VM_KMEM_SIZE_SCALE to 1 allowing kernel to use more memory
KVA space is abundant on amd64, so there is no reason to limit kernel
map size to a fraction of available physical memory. In fact, it could
be larger than physical memory.
This should help with memory auto-tuning for ZFS and shouldn't affect
other workloads.
This should reduce number of circumstances for "kmem_map too small"
panics, but probably won't eliminate them entirely due to potential kmem
fragmentation.
In fact, you might want/need to limit maximum ARC size after this commit
if you need to resrve more memory for applications.
This change was discussed on arch@ and nobody said "don't do it".
MFC after: 6 weeks
Revision Changes Path
1.62 +1 -1 src/sys/amd64/include/vmparam.h
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