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author | codeworkx <codeworkx@cyanogenmod.com> | 2012-09-18 18:51:21 +0200 |
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committer | codeworkx <codeworkx@cyanogenmod.com> | 2012-09-18 19:02:23 +0200 |
commit | f991bd2a427ec6a5e049e19745aba6a5d7f006c4 (patch) | |
tree | c6f0d428403c32c95335c34b3f0105c2e4c8087d /mm/compaction.c | |
parent | c28265764ec6ad9995eb0c761a376ffc9f141fcd (diff) | |
parent | bea37381fd9a34c6660e5195d31beea86aa3dda3 (diff) | |
download | kernel_samsung_smdk4412-f991bd2a427ec6a5e049e19745aba6a5d7f006c4.zip kernel_samsung_smdk4412-f991bd2a427ec6a5e049e19745aba6a5d7f006c4.tar.gz kernel_samsung_smdk4412-f991bd2a427ec6a5e049e19745aba6a5d7f006c4.tar.bz2 |
Merge linux-3.0.31 from korg into jellybean
Conflicts:
arch/arm/mm/proc-v7.S
drivers/base/core.c
drivers/gpu/drm/i915/i915_gem_execbuffer.c
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_lvds.c
drivers/gpu/drm/radeon/evergreen.c
drivers/gpu/drm/radeon/r100.c
drivers/gpu/drm/radeon/radeon_connectors.c
drivers/gpu/drm/radeon/rs600.c
drivers/usb/core/hub.c
drivers/usb/host/xhci-pci.c
drivers/usb/host/xhci.c
drivers/usb/serial/qcserial.c
fs/proc/base.c
Change-Id: Ia98b35db3f8c0bfd95817867d3acb85be8e5e772
Diffstat (limited to 'mm/compaction.c')
-rw-r--r-- | mm/compaction.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/mm/compaction.c b/mm/compaction.c index 9412abf..051a04e 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -320,12 +320,34 @@ static isolate_migrate_t isolate_migratepages(struct zone *zone, } else if (!locked) spin_lock_irq(&zone->lru_lock); + /* + * migrate_pfn does not necessarily start aligned to a + * pageblock. Ensure that pfn_valid is called when moving + * into a new MAX_ORDER_NR_PAGES range in case of large + * memory holes within the zone + */ + if ((low_pfn & (MAX_ORDER_NR_PAGES - 1)) == 0) { + if (!pfn_valid(low_pfn)) { + low_pfn += MAX_ORDER_NR_PAGES - 1; + continue; + } + } + if (!pfn_valid_within(low_pfn)) continue; nr_scanned++; - /* Get the page and skip if free */ + /* + * Get the page and ensure the page is within the same zone. + * See the comment in isolate_freepages about overlapping + * nodes. It is deliberate that the new zone lock is not taken + * as memory compaction should not move pages between nodes. + */ page = pfn_to_page(low_pfn); + if (page_zone(page) != zone) + continue; + + /* Skip if free */ if (PageBuddy(page)) continue; |