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From: Andriy Gapon <avg@FreeBSD.org>
Date: Fri, 17 Sep 2010 07:36:32 +0000 (UTC)
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Subject: cvs commit: src/sys/amd64/include vmparam.h
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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