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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 05:05:27 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 05:05:27 +0300
commita39ef1a7c6093bbd4e0a8197350b99cd635e5446 (patch)
tree5a19d1d1f289c52be72710f1d7cd954c830964f6 /Documentation
parentd82312c80860b8b83cd4473ac6eafd244e712061 (diff)
parent976f2ab4985a1dbe3f3f0777ce01d4fdb404c62a (diff)
downloadlinux-a39ef1a7c6093bbd4e0a8197350b99cd635e5446.tar.xz
Merge branch 'for-4.1/drivers' of git://git.kernel.dk/linux-block
Pull block driver updates from Jens Axboe: "This is the block driver pull request for 4.1. As with the core bits, this is a relatively slow round. This pull request contains: - Various fixes and cleanups for NVMe, from Alexey Khoroshilov, Chong Yuan, myself, Keith Busch, and Murali Iyer. - Documentation and code cleanups for nbd from Markus Pargmann. - Change of brd maintainer to me, from Ross Zwisler. At least the email doesn't bounce anymore then. - Two xen-blkback fixes from Tao Chen" * 'for-4.1/drivers' of git://git.kernel.dk/linux-block: (23 commits) NVMe: Meta data handling through submit io ioctl NVMe: Add translation for block limits NVMe: Remove check for null NVMe: Fix error handling of class_create("nvme") xen-blkback: define pr_fmt macro to avoid the duplication of DRV_PFX xen-blkback: enlarge the array size of blkback name nbd: Return error pointer directly nbd: Return error code directly nbd: Remove fixme that was already fixed nbd: Restructure debugging prints nbd: Fix device bytesize type nbd: Replace kthread_create with kthread_run nbd: Remove kernel internal header Documentation: nbd: Add list of module parameters Documentation: nbd: Reformat to allow more documentation NVMe: increase depth of admin queue nvme: Fix PRP list calculation for non-4k system page size NVMe: Fix blk-mq hot cpu notification NVMe: embedded iod mask cleanup NVMe: Freeze admin queue on device failure ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/blockdev/nbd.txt48
1 files changed, 31 insertions, 17 deletions
diff --git a/Documentation/blockdev/nbd.txt b/Documentation/blockdev/nbd.txt
index 271e607304da..db242ea2bce8 100644
--- a/Documentation/blockdev/nbd.txt
+++ b/Documentation/blockdev/nbd.txt
@@ -1,17 +1,31 @@
- Network Block Device (TCP version)
-
- What is it: With this compiled in the kernel (or as a module), Linux
- can use a remote server as one of its block devices. So every time
- the client computer wants to read, e.g., /dev/nb0, it sends a
- request over TCP to the server, which will reply with the data read.
- This can be used for stations with low disk space (or even diskless)
- to borrow disk space from another computer.
- Unlike NFS, it is possible to put any filesystem on it, etc.
-
- For more information, or to download the nbd-client and nbd-server
- tools, go to http://nbd.sf.net/.
-
- The nbd kernel module need only be installed on the client
- system, as the nbd-server is completely in userspace. In fact,
- the nbd-server has been successfully ported to other operating
- systems, including Windows.
+Network Block Device (TCP version)
+==================================
+
+1) Overview
+-----------
+
+What is it: With this compiled in the kernel (or as a module), Linux
+can use a remote server as one of its block devices. So every time
+the client computer wants to read, e.g., /dev/nb0, it sends a
+request over TCP to the server, which will reply with the data read.
+This can be used for stations with low disk space (or even diskless)
+to borrow disk space from another computer.
+Unlike NFS, it is possible to put any filesystem on it, etc.
+
+For more information, or to download the nbd-client and nbd-server
+tools, go to http://nbd.sf.net/.
+
+The nbd kernel module need only be installed on the client
+system, as the nbd-server is completely in userspace. In fact,
+the nbd-server has been successfully ported to other operating
+systems, including Windows.
+
+A) NBD parameters
+-----------------
+
+max_part
+ Number of partitions per device (default: 0).
+
+nbds_max
+ Number of block devices that should be initialized (default: 16).
+