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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-28 12:34:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-28 12:34:27 -0700
commit41c3e45f08201df41423aa1bbce272372a6967e4 (patch)
tree9f2b2379c5196ab8d1fcc0391c80e7a81db30481 /mm
parent604a2785a8482cad4d63202465133c720db5eda7 (diff)
parent212496fd9a5f5db0a037a2a8c6fde2d2bd93c1d7 (diff)
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5226/1: remove unmatched comment end. [ARM] Skip memory holes in FLATMEM when reading /proc/pagetypeinfo [ARM] use bcd2bin/bin2bcd [ARM] use the new byteorder headers [ARM] OMAP: Fix 2430 SMC91x ethernet IRQ [ARM] OMAP: Add and update OMAP default configuration files [ARM] OMAP: Change mailing list for OMAP in MAINTAINERS [ARM] S3C2443: Fix the S3C2443 clock register definitions [ARM] JIVE: Fix the spi bus numbering [ARM] S3C24XX: pwm.c: stop debugging output [ARM] S3C24XX: Fix sparse warnings in pwm.c [ARM] S3C24XX: Fix spare errors in pwm-clock driver [ARM] S3C24XX: Fix sparse warnings in arch/arm/plat-s3c24xx/gpiolib.c [ARM] S3C24XX: Fix nor-simtec driver sparse errors [ARM] 5225/1: zaurus: Register I2C controller for audio codecs [ARM] orion5x: update defconfig to v2.6.27-rc4 [ARM] Orion: register UART1 on QNAP TS-209 and TS-409 [ARM] Orion: activate lm75 driver on DNS-323 [ARM] Orion: fix MAC detection on QNAP TS-209 and TS-409 [ARM] Orion: Fix boot crash on Kurobox Pro
Diffstat (limited to 'mm')
-rw-r--r--mm/vmstat.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index b0d08e667ec..d7826af2fb0 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -516,9 +516,26 @@ static void pagetypeinfo_showblockcount_print(struct seq_file *m,
continue;
page = pfn_to_page(pfn);
+#ifdef CONFIG_ARCH_FLATMEM_HAS_HOLES
+ /*
+ * Ordinarily, memory holes in flatmem still have a valid
+ * memmap for the PFN range. However, an architecture for
+ * embedded systems (e.g. ARM) can free up the memmap backing
+ * holes to save memory on the assumption the memmap is
+ * never used. The page_zone linkages are then broken even
+ * though pfn_valid() returns true. Skip the page if the
+ * linkages are broken. Even if this test passed, the impact
+ * is that the counters for the movable type are off but
+ * fragmentation monitoring is likely meaningless on small
+ * systems.
+ */
+ if (page_zone(page) != zone)
+ continue;
+#endif
mtype = get_pageblock_migratetype(page);
- count[mtype]++;
+ if (mtype < MIGRATE_TYPES)
+ count[mtype]++;
}
/* Print counts */