Re: [PATCH] Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, 2007-08-02 at 18:21 +0100, Mel Gorman wrote:
> The NUMA layer only supports NUMA policies for the highest zone. When
> ZONE_MOVABLE is configured with kernelcore=, the the highest zone becomes
> ZONE_MOVABLE. The result is that policies are only applied to allocations
> like anonymous pages and page cache allocated from ZONE_MOVABLE when the
> zone is used.
> 
> This patch applies policies to the two highest zones when the highest zone
> is ZONE_MOVABLE. As ZONE_MOVABLE consists of pages from the highest "real"
> zone, it's always functionally equivalent.
> 
> The patch has been tested on a variety of machines both NUMA and non-NUMA
> covering x86, x86_64 and ppc64. No abnormal results were seen in kernbench,
> tbench, dbench or hackbench. It passes regression tests from the numactl
> package with and without kernelcore= once numactl tests are patched to
> wait for vmstat counters to update.
> 
> Signed-off-by: Mel Gorman <[email protected]>


And an ia_64 NUMA platform with some ad hoc, interactive functional
testing with memtoy and an overnight run of a usex job mix.  Job mix
included a 32-way kernel build, several povray tracing apps, IO tests,
sequential and random vm fault tests and a number of 'bin' tests that
simulate a half a dozen crazed monkeys pounding away at keyboards
entering surprisingly error-free commands.  All of these loop until
stopped or the system hangs/crashes--which it didn't...


Acked-by:  Lee Schermerhorn <[email protected]>
Tested-by:  Lee Schermerhorn <[email protected]>



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux