linux/Documentation/block, branch v3.13.2

null_blk: set use_per_node_hctx param to false

2013-12-21T16:30:33Z

The defaults for the module is to instantiate itself with blk-mq and a submit queue for each CPU node in the system. To save resources, initialize instead with a single submit queue. Signed-off-by: Matias Bjorling Signed-off-by: Jens Axboe

null_blk: corrections to documentation

2013-12-21T16:30:33Z

Randy Dunlap reported a couple of grammar errors and unfortunate usages of socket/node/core. Signed-off-by: Matias Bjorling Acked-by: Randy Dunlap Signed-off-by: Jens Axboe

null_blk: documentation

2013-12-19T15:09:41Z

Add description of module and its parameters. Signed-off-by: Matias Bjorling Signed-off-by: Jens Axboe

block: change config option name for cmdline partition parsing

2013-09-30T21:31:02Z

Recently commit bab55417b10c ("block: support embedded device command line partition") introduced CONFIG_CMDLINE_PARSER. However, that name is too generic and sounds like it enables/disables generic kernel boot arg processing, when it really is block specific. Before this option becomes a part of a full/final release, add the BLK_ prefix to it so that it is clear in absence of any other context that it is block specific. In addition, fix up the following less critical items: - help text was not really at all helpful. - index file for Documentation was not updated - add the new arg to Documentation/kernel-parameters.txt - clarify wording in source comments Signed-off-by: Paul Gortmaker Cc: Jens Axboe Cc: Cai Zhiyong Cc: Wei Yongjun Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

block: support embedded device command line partition

2013-09-11T22:56:57Z

Read block device partition table from command line. The partition used for fixed block device (eMMC) embedded device. It is no MBR, save storage space. Bootloader can be easily accessed by absolute address of data on the block device. Users can easily change the partition. This code reference MTD partition, source "drivers/mtd/cmdlinepart.c" About the partition verbose reference "Documentation/block/cmdline-partition.txt" [akpm@linux-foundation.org: fix printk text] [yongjun_wei@trendmicro.com.cn: fix error return code in parse_parts()] Signed-off-by: Cai Zhiyong Cc: Karel Zak Cc: "Wanglin (Albert)" Cc: Marius Groeger Cc: David Woodhouse Cc: Jens Axboe Cc: Brian Norris Cc: Artem Bityutskiy Signed-off-by: Wei Yongjun Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

doc: Fix typo in doucmentations

2013-07-25T10:34:15Z

Correct typo (double words) in documentations. Signed-off-by: Masanari Iida Acked-by: Randy Dunlap Signed-off-by: Jiri Kosina

doc: fix misspellings with 'codespell' tool

2013-05-28T10:02:12Z

Signed-off-by: Anatol Pomozov Signed-off-by: Jiri Kosina

Documentation: cfq-iosched: update documentation help for cfq tunables

2013-04-09T12:57:06Z

Add the documentation text for latency, target_latency & group_idle tunnable parameters in the block/cfq-iosched.txt. Also fix few typo(spelling) mistakes. Signed-off-by: Namjae Jeon Signed-off-by: Amit Sahrawat Language somewhat modified by Jens. Signed-off-by: Jens Axboe

cfq-iosched: enable full blkcg hierarchy support

2013-01-09T16:05:11Z

With the previous two patches, all cfqg scheduling decisions are based on vfraction and ready for hierarchy support. The only thing which keeps the behavior flat is cfqg_flat_parent() which makes vfraction calculation consider all non-root cfqgs children of the root cfqg. Replace it with cfqg_parent() which returns the real parent. This enables full blkcg hierarchy support for cfq-iosched. For example, consider the following hierarchy. root / \ A:500 B:250 / \ AA:500 AB:1000 For simplicity, let's say all the leaf nodes have active tasks and are on service tree. For each leaf node, vfraction would be AA: (500 / 1500) * (500 / 750) =~ 0.2222 AB: (1000 / 1500) * (500 / 750) =~ 0.4444 B: (250 / 750) =~ 0.3333 and vdisktime will be distributed accordingly. For more detail, please refer to Documentation/block/cfq-iosched.txt. v2: cfq-iosched.txt updated to describe group scheduling as suggested by Vivek. v3: blkio-controller.txt updated. Signed-off-by: Tejun Heo Acked-by: Vivek Goyal

block: Kill bi_destructor

2012-09-09T08:35:39Z

Now that we've got generic code for freeing bios allocated from bio pools, this isn't needed anymore. This patch also makes bio_free() static, since without bi_destructor there should be no need for it to be called anywhere else. bio_free() is now only called from bio_put, so we can refactor those a bit - move some code from bio_put() to bio_free() and kill the redundant bio->bi_next = NULL. v5: Switch to BIO_KMALLOC_POOL ((void *)~0), per Boaz v6: BIO_KMALLOC_POOL now NULL, drop bio_free's EXPORT_SYMBOL v7: No #define BIO_KMALLOC_POOL anymore Signed-off-by: Kent Overstreet CC: Jens Axboe Signed-off-by: Jens Axboe