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| author |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-05-15 10:39:34 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-06-04 15:58:35 -0400 |
| commit | 2d5dc3ba853344f39a41ae5bdb0a337b2ecaafa6 (patch) | |
| tree | dcf56fdf3898ebc4c4f5c0084b55be5fa8056b24 /Documentation/ABI/testing/sysfs-driver-xen-blkfront | |
| parent | xen-blkfront: use a different scatterlist for each request (diff) | |
| download | linux-dev-2d5dc3ba853344f39a41ae5bdb0a337b2ecaafa6.tar.xz linux-dev-2d5dc3ba853344f39a41ae5bdb0a337b2ecaafa6.zip | |
xen-blkfront: Introduce a 'max' module parameter to alter the amount of indirect segments.
The max module parameter (by default 32) is the maximum number of
segments that the frontend will negotiate with the backend for indirect
descriptors. Higher value means more potential throughput but more
memory usage. The backend picks the minimum of the frontend and its
default backend value.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-driver-xen-blkfront')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-xen-blkfront | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-xen-blkfront b/Documentation/ABI/testing/sysfs-driver-xen-blkfront new file mode 100644 index 000000000000..c0a6cb7eb314 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xen-blkfront @@ -0,0 +1,10 @@ +What: /sys/module/xen_blkfront/parameters/max +Date: June 2013 +KernelVersion: 3.11 +Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> +Description: + Maximum number of segments that the frontend will negotiate + with the backend for indirect descriptors. The default value + is 32 - higher value means more potential throughput but more + memory usage. The backend picks the minimum of the frontend + and its default backend value. |