diff options
| author | Krutika Dhananjay <kdhananj@redhat.com> | 2016-06-07 16:27:34 +0530 |
|---|---|---|
| committer | Jeff Darcy <jdarcy@redhat.com> | 2016-06-28 14:52:42 -0700 |
| commit | 1e60f9746cf7cb8ce34e2b1572410c39b11d7664 (patch) | |
| tree | 82c839e73e452222a2b9445c535d0241306bcf41 /libglusterfs/src/iobuf.h | |
| parent | 60cc8ddaf6105b89e5ce3222c5c5a014deda6a15 (diff) | |
libglusterfs: Implement API that provides page-aligned iobufs
One of the consumers of a page aligned buffer would be posix's
readv fop on O_DIRECT fds. Today the way it works is by getting
a page-aligned buffer through calloc, pread()ing into this buffer
and then copying its contents into a newly created iobuf's ptr.
This results in an extra memcpy() which can be avoided if we could
implement an api that would return an iobuf whose ptr is
page-aligned. That way the iobuf->ptr can be directly passed to
sys_pread() as a parameter by posix translator.
Change-Id: I385139bc6ee309fc501034b3af8f7814fab8cd65
BUG: 1343838
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/14672
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Zhou Zhengping <johnzzpcrystal@gmail.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Diffstat (limited to 'libglusterfs/src/iobuf.h')
| -rw-r--r-- | libglusterfs/src/iobuf.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libglusterfs/src/iobuf.h b/libglusterfs/src/iobuf.h index 7e5cfe37a28..1578ceb84dd 100644 --- a/libglusterfs/src/iobuf.h +++ b/libglusterfs/src/iobuf.h @@ -169,4 +169,8 @@ void iobuf_stats_dump (struct iobuf_pool *iobuf_pool); struct iobuf * iobuf_get2 (struct iobuf_pool *iobuf_pool, size_t page_size); + +struct iobuf * +iobuf_get_page_aligned (struct iobuf_pool *iobuf_pool, size_t page_size, + size_t align_size); #endif /* !_IOBUF_H_ */ |