strlen() doesn't count the NUL terminator. I missed this one in the
patches I sent yesterday.
Signed-off-by: Dan Carpenter
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 29850cb..ea72198 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -1424,7
vhost-blk is a in kernel virito-blk device accelerator.
This patch is based on Liu Yuan's implementation with various
improvements and bug fixes. Notably, this patch makes guest notify and
host completion processing in parallel which gives about 60% performance
improvement compared to Liu Yuan's i
vhost-net's feature does not deseve the name VHOST_FEATURES. Use
VHOST_NET_FEATURES instead.
Cc: Michael S. Tsirkin
Cc: linux-ker...@vger.kernel.org
Cc: k...@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Asias He
---
drivers/vhost/net.c |4 ++--
drivers/vhos
Currently, vhost-net is the only consumer of vhost infrastructure. So
vhost infrastructure and vhost-net driver are in a single module.
Separating this as a vhost.ko module and a vhost-net.ko module makes it
is easier to share code with other vhost drivers, e.g. vhost-blk.ko,
tcm-vhost.ko.
Cc: Mi
This is useful for people who want to create an eventfd in kernel,
e.g. vhost-blk.
Cc: Alexander Viro
Cc: Jeff Moyer
Cc: Michael S. Tsirkin
Cc: linux-fsde...@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
Cc: k...@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: As
This is useful for people who want to use aio in kernel, e.g. vhost-blk.
Cc: Benjamin LaHaise
Cc: Alexander Viro
Cc: Jeff Moyer
Cc: James Bottomley
Cc: Michael S. Tsirkin
Cc: linux-...@kvack.org
Cc: linux-fsde...@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
Cc: k...@vger.kernel.org
Cc: vi
Hi folks,
[I am resending to fix the broken thread in the previous one.]
This patchset adds vhost-blk support. vhost-blk is a in kernel virito-blk
device accelerator. Compared to userspace virtio-blk implementation, vhost-blk
gives about 5% to 15% performance improvement.
Asias He (5):
aio: E
This patch introduces bio-based IO path for virtio-blk.
Compared to request-based IO path, bio-based IO path uses driver
provided ->make_request_fn() method to bypasses the IO scheduler. It
handles the bio to device directly without allocating a request in block
layer. This reduces the IO path in
Add a helper to map a bio to a scatterlist, modelled after
blk_rq_map_sg.
This helper is useful for any driver that wants to create
a scatterlist from its ->make_request_fn method.
Changes in v2:
- Use __blk_segment_map_sg to avoid duplicated code
- Add cocbook style function comment
Cc: Jens
Split the mapping code in blk_rq_map_sg() to a helper
__blk_segment_map_sg(), so that other mapping function, e.g.
blk_bio_map_sg(), can share the code.
Cc: Jens Axboe
Cc: Tejun Heo
Cc: Shaohua Li
Cc: linux-ker...@vger.kernel.org
Suggested-by: Tejun Heo
Suggested-by: Jens Axboe
Signed-off-by:
This patchset implements bio-based IO path for virito-blk to improve
performance.
Fio test shows bio-based IO path gives the following performance improvement:
1) Ramdisk device
With bio-based IO path, sequential read/write, random read/write
IOPS boost : 28%, 24%, 21%, 16%
When populate pages across a mem boundary at bootup, the page count
populated isn't correct. This is due to mem populated to non-mem
region and ignored.
Pfn range is also wrongly aligned when mem boundary isn't page aligned.
-v2: If xen_do_chunk fail(populate), abort this chunk and any others.
S
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