pnfs/blocklayout: allocate separate pages for the layoutcommit payload

Browse source

Instead of overflowing the XDR send buffer with our extent list allocate
pages and pre-encode the layoutupdate payload into them.  We optimistically
allocate a single page use alloc_page and only switch to vmalloc when we
have more extents outstanding.  Currently there is only a single testcase
(xfstests generic/113) which can reproduce large enough extent lists for
this to occur.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

...

This commit is contained in:

Christoph Hellwig 2014-09-10 17:36:30 -07:00 • committed by Trond Myklebust

parent d4b18c3e00

commit 34dc93c2fc

3 changed files with 91 additions and 34 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

15

fs/nfs/blocklayout/blocklayout.c

View file

8

fs/nfs/blocklayout/blocklayout.h

View file

104

fs/nfs/blocklayout/extent_tree.c

View file