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| author | Mel Gorman <mgorman@suse.de> | 2013-02-22 16:34:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:18 -0800 |
| commit | a4e1b4c6c6db7b7d1ca7f399b4e08aa381f23899 (patch) | |
| tree | 5546e920bdf0c88aa1b838b5e12a95fc90b59efa /mm | |
| parent | 4468b8f1e2d32ce79ef4bcb8e00d7e88627f1c3a (diff) | |
| download | lwn-a4e1b4c6c6db7b7d1ca7f399b4e08aa381f23899.tar.gz lwn-a4e1b4c6c6db7b7d1ca7f399b4e08aa381f23899.zip | |
mm: init: report on last-nid information stored in page->flags
Answering the question "how much space remains in the page->flags" is
time-consuming. mminit_loglevel can help answer the question but it
does not take last_nid information into account. This patch corrects it
and while there it corrects the messages related to page flag usage,
pgshifts and node/zone id. When applied the relevant output looks
something like this but will depend on the kernel configuration.
mminit::pageflags_layout_widths Section 0 Node 9 Zone 2 Lastnid 9 Flags 25
mminit::pageflags_layout_shifts Section 19 Node 9 Zone 2 Lastnid 9
mminit::pageflags_layout_pgshifts Section 0 Node 55 Zone 53 Lastnid 44
mminit::pageflags_layout_nodezoneid Node/Zone ID: 64 -> 53
mminit::pageflags_layout_usage location: 64 -> 44 layout 44 -> 25 unused 25 -> 0 page-flags
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mm_init.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/mm/mm_init.c b/mm/mm_init.c index 1ffd97ae26d7..c280a02ea11e 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -69,34 +69,41 @@ void __init mminit_verify_pageflags_layout(void) unsigned long or_mask, add_mask; shift = 8 * sizeof(unsigned long); - width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH; + width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_NID_SHIFT; mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths", - "Section %d Node %d Zone %d Flags %d\n", + "Section %d Node %d Zone %d Lastnid %d Flags %d\n", SECTIONS_WIDTH, NODES_WIDTH, ZONES_WIDTH, + LAST_NID_WIDTH, NR_PAGEFLAGS); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts", - "Section %d Node %d Zone %d\n", + "Section %d Node %d Zone %d Lastnid %d\n", SECTIONS_SHIFT, NODES_SHIFT, - ZONES_SHIFT); - mminit_dprintk(MMINIT_TRACE, "pageflags_layout_offsets", - "Section %lu Node %lu Zone %lu\n", + ZONES_SHIFT, + LAST_NID_SHIFT); + mminit_dprintk(MMINIT_TRACE, "pageflags_layout_pgshifts", + "Section %lu Node %lu Zone %lu Lastnid %lu\n", (unsigned long)SECTIONS_PGSHIFT, (unsigned long)NODES_PGSHIFT, - (unsigned long)ZONES_PGSHIFT); - mminit_dprintk(MMINIT_TRACE, "pageflags_layout_zoneid", - "Zone ID: %lu -> %lu\n", - (unsigned long)ZONEID_PGOFF, - (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT)); + (unsigned long)ZONES_PGSHIFT, + (unsigned long)LAST_NID_PGSHIFT); + mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodezoneid", + "Node/Zone ID: %lu -> %lu\n", + (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT), + (unsigned long)ZONEID_PGOFF); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_usage", - "location: %d -> %d unused %d -> %d flags %d -> %d\n", + "location: %d -> %d layout %d -> %d unused %d -> %d page-flags\n", shift, width, width, NR_PAGEFLAGS, NR_PAGEFLAGS, 0); #ifdef NODE_NOT_IN_PAGE_FLAGS mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags", "Node not in page flags"); #endif +#ifdef LAST_NID_NOT_IN_PAGE_FLAGS + mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags", + "Last nid not in page flags"); +#endif if (SECTIONS_WIDTH) { shift -= SECTIONS_WIDTH; |