The patch titled
Subject: mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update
has been added to the -mm tree. Its filename is
mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update.patch
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------------------------------------------------------
From: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
Subject: mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff -puN mm/page_alloc.c~mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update mm/page_alloc.c
--- a/mm/page_alloc.c~mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update
+++ a/mm/page_alloc.c
@@ -1174,7 +1174,13 @@ void drain_local_pages(void *arg)
}
/*
- * Spill all the per-cpu pages from all CPUs back into the buddy allocator
+ * Spill all the per-cpu pages from all CPUs back into the buddy allocator.
+ *
+ * Note that this code is protected against sending an IPI to an offline
+ * CPU but does not guarantee sending an IPI to newly hotplugged CPUs:
+ * on_each_cpu_mask() blocks hotplug and won't talk to offlined CPUs but
+ * nothing keeps CPUs from showing up after we populated the cpumask and
+ * before the call to on_each_cpu_mask().
*/
void drain_all_pages(void)
{
_
Subject: Subject: mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update
Patches currently in -mm which might be from gilad@xxxxxxxxxxxxx are
smp-introduce-a-generic-on_each_cpu_mask-function.patch
arm-move-arm-over-to-generic-on_each_cpu_mask.patch
tile-move-tile-to-use-generic-on_each_cpu_mask.patch
smp-add-func-to-ipi-cpus-based-on-parameter-func.patch
smp-add-func-to-ipi-cpus-based-on-parameter-func-fix.patch
smp-add-func-to-ipi-cpus-based-on-parameter-func-update.patch
slub-only-ipi-cpus-that-have-per-cpu-obj-to-flush.patch
fs-only-send-ipi-to-invalidate-lru-bh-when-needed.patch
mm-only-ipi-cpus-to-drain-local-pages-if-they-exist.patch
mm-only-ipi-cpus-to-drain-local-pages-if-they-exist-update.patch
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