kernel/linux.git/block/blk.h, branch linux-2.6.28.y

block: remove __generic_unplug_device() from exports

2008-10-17T12:03:08+00:00

The only out-of-core user is IDE, and that should be using blk_start_queueing() instead. Signed-off-by: Jens Axboe

block: add fault injection mechanism for faking request timeouts

2008-10-09T06:56:17+00:00

Only works for the generic request timer handling. Allows one to sporadically ignore request completions, thus exercising the timeout handling. Signed-off-by: Jens Axboe

block: unify request timeout handling

2008-10-09T06:56:13+00:00

Right now SCSI and others do their own command timeout handling. Move those bits to the block layer. Instead of having a timer per command, we try to be a bit more clever and simply have one per-queue. This avoids the overhead of having to tear down and setup a timer for each command, so it will result in a lot less timer fiddling. Signed-off-by: Mike Anderson Signed-off-by: Jens Axboe

block: add support for IO CPU affinity

2008-10-09T06:56:09+00:00

This patch adds support for controlling the IO completion CPU of either all requests on a queue, or on a per-request basis. We export a sysfs variable (rq_affinity) which, if set, migrates completions of requests to the CPU that originally submitted it. A bio helper (bio_set_completion_cpu()) is also added, so that queuers can ask for completion on that specific CPU. In testing, this has been show to cut the system time by as much as 20-40% on synthetic workloads where CPU affinity is desired. This requires a little help from the architecture, so it'll only work as designed for archs that are using the new generic smp helper infrastructure. Signed-off-by: Jens Axboe

block: Block layer data integrity support

2008-07-03T11:21:13+00:00

Some block devices support verifying the integrity of requests by way of checksums or other protection information that is submitted along with the I/O. This patch implements support for generating and verifying integrity metadata, as well as correctly merging, splitting and cloning bios and requests that have this extra information attached. See Documentation/block/data-integrity.txt for more information. Signed-off-by: Martin K. Petersen Signed-off-by: Jens Axboe

block: rename and export rq_init()

2008-04-29T12:48:55+00:00

This rename rq_init() blk_rq_init() and export it. Any path that hands the request to the block layer needs to call it to initialize the request. This is a preparation for large command support, which needs to initialize the request in a proper way (that is, just doing a memset() will not work). Signed-off-by: FUJITA Tomonori Cc: Jens Axboe Signed-off-by: Jens Axboe

proper prototype for blk_dev_init()

2008-03-04T10:28:29+00:00

This patch adds a proper prototye for blk_dev_init() in block/blk.h Signed-off-by: Adrian Bunk Signed-off-by: Jens Axboe

block: ll_rw_blk.c split, add blk-merge.c

2008-01-29T20:55:12+00:00

Signed-off-by: Jens Axboe

block: continue ll_rw_blk.c splitup

2008-01-29T20:55:08+00:00

Adds files for barrier handling, rq execution, io context handling, mapping data to requests, and queue settings. Signed-off-by: Jens Axboe

block: split tag and sysfs handling from blk-core.c

2008-01-29T20:55:07+00:00

Seperates the tag and sysfs handling from ll_rw_blk. Signed-off-by: Jens Axboe