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authorRobin Holt <holt@sgi.com>2005-04-25 13:13:16 -0700
committerTony Luck <tony.luck@intel.com>2005-04-25 13:13:16 -0700
commitfde740e4dd4a05ca8957490d468fa9b2770f5bd6 (patch)
tree04bc0221bc6c59379a17f3631fc4bd3c886e1d61 /include/asm-ia64/processor.h
parentff3eb55ed97db3f12964beeffe3d34602d295367 (diff)
downloadop-kernel-dev-fde740e4dd4a05ca8957490d468fa9b2770f5bd6.zip
op-kernel-dev-fde740e4dd4a05ca8957490d468fa9b2770f5bd6.tar.gz
[IA64] Percpu quicklist for combined allocator for pgd/pmd/pte.
This patch introduces using the quicklists for pgd, pmd, and pte levels by combining the alloc and free functions into a common set of routines. This greatly simplifies the reading of this header file. This patch is simple but necessary for large numa configurations. It simply ensures that only pages from the local node are added to a cpus quicklist. This prevents the trapping of pages on a remote nodes quicklist by starting a process, touching a large number of pages to fill pmd and pte entries, migrating to another node, and then unmapping or exiting. With those conditions, the pages get trapped and if the machine has more than 100 nodes of the same size, the calculation of the pgtable high water mark will be larger than any single node so page table cache flushing will never occur. I ran lmbench lat_proc fork and lat_proc exec on a zx1 with and without this patch and did not notice any change. On an sn2 machine, there was a slight improvement which is possibly due to pages from other nodes trapped on the test node before starting the run. I did not investigate further. This patch shrinks the quicklist based upon free memory on the node instead of the high/low water marks. I have written it to enable preemption periodically and recalculate the amount to shrink every time we have freed enough pages that the quicklist size should have grown. I rescan the nodes zones each pass because other processess may be draining node memory at the same time as we are adding. Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64/processor.h')
-rw-r--r--include/asm-ia64/processor.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/include/asm-ia64/processor.h b/include/asm-ia64/processor.h
index 2807f8d..983798e 100644
--- a/include/asm-ia64/processor.h
+++ b/include/asm-ia64/processor.h
@@ -137,9 +137,6 @@ struct cpuinfo_ia64 {
__u64 nsec_per_cyc; /* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */
__u64 unimpl_va_mask; /* mask of unimplemented virtual address bits (from PAL) */
__u64 unimpl_pa_mask; /* mask of unimplemented physical address bits (from PAL) */
- __u64 *pgd_quick;
- __u64 *pmd_quick;
- __u64 pgtable_cache_sz;
__u64 itc_freq; /* frequency of ITC counter */
__u64 proc_freq; /* frequency of processor */
__u64 cyc_per_usec; /* itc_freq/1000000 */
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