A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 11:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

percpu: move region iterations out of pcpu_[de]populate_chunk()

Browse source 
Previously, pcpu_[de]populate_chunk() were called with the range which
may contain multiple target regions in it and
pcpu_[de]populate_chunk() iterated over the regions.  This has the
benefit of batching up cache flushes for all the regions; however,
we're planning to add more bookkeeping logic around [de]population to
support atomic allocations and this delegation of iterations gets in
the way.

This patch moves the region iterations out of
pcpu_[de]populate_chunk() into its callers - pcpu_alloc() and
pcpu_reclaim() - so that we can later add logic to track more states
around them.  This change may make cache and tlb flushes more frequent
but multi-region [de]populations are rare anyway and if this actually
becomes a problem, it's not difficult to factor out cache flushes as
separate callbacks which are directly invoked from percpu.c.

Signed-off-by: Tejun Heo <[email protected]>
This commit is contained in:
Tejun Heo 2014-09-02 14:46:02 -04:00
commit a93ace487a
3 changed files with 28 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

6
mm/percpu-km.c
View file

@ -33,12 +33,14 @@
#include <linux/log2.h>
static int pcpu_populate_chunk(struct pcpu_chunk *chunk, int off, int size)
static int pcpu_populate_chunk(struct pcpu_chunk *chunk,
int page_start, int page_end)
{
return 0;
}
static void pcpu_depopulate_chunk(struct pcpu_chunk *chunk, int off, int size)
static void pcpu_depopulate_chunk(struct pcpu_chunk *chunk,
int page_start, int page_end)
{
/* nada */
}