ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated

Browse Source 
pcpu_nr_empty_pop_pages counts the number of empty populated pages
across all chunks and chunk->nr_populated counts the number of
populated pages in a chunk.  Both will be used to implement pre/async
population for atomic allocations.

pcpu_chunk_[de]populated() are added to update chunk->populated,
chunk->nr_populated and pcpu_nr_empty_pop_pages together.  All
successful chunk [de]populations should be followed by the
corresponding pcpu_chunk_[de]populated() calls.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
2014-09-02 14:46:05 -04:00
parent 9c824b6a17
commit b539b87fed
2 changed files with 114 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
mm/percpu-km.c
View File

@@ -69,7 +69,7 @@ static struct pcpu_chunk *pcpu_create_chunk(void)
chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];
spin_lock_irq(&pcpu_lock);
bitmap_fill(chunk->populated, nr_pages);
pcpu_chunk_populated(chunk, 0, nr_pages);
spin_unlock_irq(&pcpu_lock);
return chunk;