d/numam-spdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

bdev_virtio: specify limitations in README.md

Browse Source 
Change-Id: Ifb913c85392eb7d9803726b40895906bdf2b3281
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/378616
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Dariusz Stojaczyk 2017-09-14 19:29:52 +02:00 committed by Jim Harris
parent 49934e252e
commit 9f2784ec21
1 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/bdev/virtio/README.md
View File

@ -1,15 +1,15 @@
# SPDK virtio bdev module
This directory contains an experimental SPDK virtio bdev module.
It currently supports very basic enumeration capabilities for
virtio-scsi devices as well as read/write operations to any
SCSI LUNs discovered during enumeration.
It currently supports very basic read/write operations for
virtio-scsi drive. Currently it will only work with a single
target with a single LUN.
It supports two different usage models:
* PCI - This is the standard mode of operation when used in a guest virtual
machine, where QEMU has presented the virtio-scsi controller as a virtual
PCI device. The virtio-scsi controller might be implemented in the host OS
by SPDK vhost-scsi, kernel vhost-scsi, or a QEMU virtio-scsi backend.
by SPDK vhost-scsi. Kernel/QEMU vhost-scsi are not supported yet.
* User vhost - Can be used to connect to an SPDK vhost-scsi target running on
the same host.
@ -20,8 +20,7 @@ every huge page explicitly, it is fairly limited on how many file descriptors
it can pass due to the VHOST_MEMORY_MAX_NREGIONS limit of 8.
Use the following configuration file snippet to enumerate a virtio-scsi PCI
device and present its LUNs as bdevs. Currently it will only work with
a single PCI device.
device and present its LUNs as bdevs.
~~~{.sh}
[Virtio]