linux-toradex.git/block/Makefile, branch v2.6.32.41

block: add blk-iopoll, a NAPI like approach for block devices

2009-09-11T12:33:31+00:00

This borrows some code from NAPI and implements a polled completion
mode for block devices. The idea is the same as NAPI - instead of
doing the command completion when the irq occurs, schedule a dedicated
softirq in the hopes that we will complete more IO when the iopoll
handler is invoked. Devices have a budget of commands assigned, and will
stay in polled mode as long as they continue to consume their budget
from the iopoll softirq handler. If they do not, the device is set back
to interrupt completion mode.

This patch holds the core bits for blk-iopoll, device driver support
sold separately.

Signed-off-by: Jens Axboe

block: get rid of queue-private command filter

2009-07-01T08:56:26+00:00

The initial patches to support this through sysfs export were broken
and have been if 0'ed out in any release. So lets just kill the code
and reclaim some space in struct request_queue, if anyone would later
like to fixup the sysfs bits, the git history can easily restore
the removed bits.

Signed-off-by: Jens Axboe

tracing/blktrace: move the tracing file to kernel/trace

2009-02-09T09:51:02+00:00

Impact: cleanup

Move blktrace.c to kernel/trace, also move its config entry.

Signed-off-by: Frederic Weisbecker 
Acked-by: Arnaldo Carvalho de Melo 
Acked-by: Jens Axboe 
Signed-off-by: Ingo Molnar

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: split softirq handling into blk-softirq.c

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

Signed-off-by: Jens Axboe

allow userspace to modify scsi command filter on per device basis

2008-07-03T11:21:14+00:00

This patch exports the per-gendisk command filter to user space through
sysfs, so it can be changed by the system administrator.
All users of the old cmd filter have been converted to use the new one.

Original patch from Peter Jones.

Signed-off-by: Adel Gadllah 
Signed-off-by: Peter Jones 
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: 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