1. 26 6月, 2005 1 次提交
  2. 22 6月, 2005 1 次提交
    • M
      [PATCH] VM: early zone reclaim · 753ee728
      Martin Hicks 提交于
      This is the core of the (much simplified) early reclaim.  The goal of this
      patch is to reclaim some easily-freed pages from a zone before falling back
      onto another zone.
      
      One of the major uses of this is NUMA machines.  With the default allocator
      behavior the allocator would look for memory in another zone, which might be
      off-node, before trying to reclaim from the current zone.
      
      This adds a zone tuneable to enable early zone reclaim.  It is selected on a
      per-zone basis and is turned on/off via syscall.
      
      Adding some extra throttling on the reclaim was also required (patch
      4/4).  Without the machine would grind to a crawl when doing a "make -j"
      kernel build.  Even with this patch the System Time is higher on
      average, but it seems tolerable.  Here are some numbers for kernbench
      runs on a 2-node, 4cpu, 8Gig RAM Altix in the "make -j" run:
      
      			wall  user   sys   %cpu  ctx sw.  sleeps
      			----  ----   ---   ----   ------  ------
      No patch		1009  1384   847   258   298170   504402
      w/patch, no reclaim     880   1376   667   288   254064   396745
      w/patch & reclaim       1079  1385   926   252   291625   548873
      
      These numbers are the average of 2 runs of 3 "make -j" runs done right
      after system boot.  Run-to-run variability for "make -j" is huge, so
      these numbers aren't terribly useful except to seee that with reclaim
      the benchmark still finishes in a reasonable amount of time.
      
      I also looked at the NUMA hit/miss stats for the "make -j" runs and the
      reclaim doesn't make any difference when the machine is thrashing away.
      
      Doing a "make -j8" on a single node that is filled with page cache pages
      takes 700 seconds with reclaim turned on and 735 seconds without reclaim
      (due to remote memory accesses).
      
      The simple zone_reclaim syscall program is at
      http://www.bork.org/~mort/sgi/zone_reclaim.cSigned-off-by: NMartin Hicks <mort@sgi.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      753ee728
  3. 01 5月, 2005 1 次提交
  4. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4