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 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

rbd: skip the copyup when an entire object writing

Browse source 
It need to copyup the parent's content when layered writing,
but an entire object write would overwrite it, so skip it.

Signed-off-by: Guangliang Zhao <[email protected]>
Reviewed-by: Josh Durgin <[email protected]>
Reviewed-by: Alex Elder <[email protected]>
This commit is contained in:
Guangliang Zhao 2014-04-01 22:22:15 +08:00 • committed by Ilya Dryomov
commit c622d22615
1 changed files with 8 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/block/rbd.c
View file

@ -2769,6 +2769,14 @@ static bool img_obj_request_simple(struct rbd_obj_request *obj_request)
if (!obj_request_overlaps_parent(obj_request))
return true;
/*
* Entire-object layered writes - we will overwrite whatever
* parent data there is anyway.
*/
if (!obj_request->offset &&
obj_request->length == rbd_obj_bytes(&rbd_dev->header))
return true;
/*
* If the object is known to already exist, its parent data has
* already been copied.