SUNRPC: Add svc_rqst_replace_page() API

Browse source

Replacing a page in rq_pages[] requires a get_page(), which is a
bus-locked operation, and a put_page(), which can be even more
costly.

To reduce the cost of replacing a page in rq_pages[], batch the
put_page() operations by collecting "freed" pages in a pagevec,
and then release those pages when the pagevec is full. This
pagevec is also emptied when each RPC completes.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

...

This commit is contained in:

Chuck Lever 2021-07-01 10:03:10 -04:00

parent c7e0b781b7

commit 2f0f88f42f

3 changed files with 28 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

include/linux/sunrpc/svc.h

View file

21

net/sunrpc/svc.c

View file

3

net/sunrpc/svc_xprt.c

View file