| commit | ace1d816a13ff42d4f41989862552032f9c19853 | |
| author | Robin Holt <holt@sgi.com> | |
| Thu, 13 Apr 2006 22:34:45 +0000 (13 15:34 -0700) | ||
| committer | Tony Luck <tony.luck@intel.com> | |
| Thu, 13 Apr 2006 22:34:45 +0000 (13 15:34 -0700) | ||
| tree | 084277670a76f9a50449e82b308ecc7b881fd5ac | treesnapshot (tar.gz zip) |
| parent | 356a5c1c6fdfb8eed6dbb3979d90c7cc7060017a | commitdiff |
[IA64] Make show_mem() skip holes in a pgdat
This patch modifies ia64's show_mem() to walk the vmem_map page tables and
rapidly skip forward across regions where the page tables are missing.
This prevents the pfn_valid() check from causing numerous unnecessary
page faults.
Without this patch on a 512 node 512 cpu system where every node has four
memory holes, the show_mem() call takes 1 hour 18 minutes. With this
patch, it takes less than 3 seconds.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This patch modifies ia64's show_mem() to walk the vmem_map page tables and
rapidly skip forward across regions where the page tables are missing.
This prevents the pfn_valid() check from causing numerous unnecessary
page faults.
Without this patch on a 512 node 512 cpu system where every node has four
memory holes, the show_mem() call takes 1 hour 18 minutes. With this
patch, it takes less than 3 seconds.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
| arch/ia64/mm/discontig.c | diffblobblamehistory |