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percpu: implement new dynamic percpu allocator

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Impact: new scalable dynamic percpu allocator which allows dynamic
        percpu areas to be accessed the same way as static ones

Implement scalable dynamic percpu allocator which can be used for both
static and dynamic percpu areas.  This will allow static and dynamic
areas to share faster direct access methods.  This feature is optional
and enabled only when CONFIG_HAVE_DYNAMIC_PER_CPU_AREA is defined by
arch.  Please read comment on top of mm/percpu.c for details.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Andrew Morton <[email protected]>
This commit is contained in:
Tejun Heo 2009-02-20 16:29:08 +09:00
commit fbf59bc9d7
4 changed files with 943 additions and 4 deletions
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4
mm/Makefile
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@ -30,6 +30,10 @@ obj-$(CONFIG_FAILSLAB) += failslab.o
obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
obj-$(CONFIG_FS_XIP) += filemap_xip.o
obj-$(CONFIG_MIGRATION) += migrate.o
ifdef CONFIG_HAVE_DYNAMIC_PER_CPU_AREA
obj-$(CONFIG_SMP) += percpu.o
else
obj-$(CONFIG_SMP) += allocpercpu.o
endif
obj-$(CONFIG_QUICKLIST) += quicklist.o
obj-$(CONFIG_CGROUP_MEM_RES_CTLR) += memcontrol.o page_cgroup.o