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5 Commits

Author SHA1 Message Date
Jens Axboe
a33dac26d4 block: use interrupts disabled version of raise_softirq_irqoff() 
We already have interrupts disabled at that point, so use the
__raise_softirq_irqoff() variant.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
 2009-09-11 14:33:32 +02:00
Jens Axboe
fca51d64c5 block: fix comment in blk-iopoll.c 
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
 2009-09-11 14:33:32 +02:00
Jens Axboe
37867ae7c5 block: adjust default budget for blk-iopoll 
It's not exported, I doubt we'll have a reason to change this...

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
 2009-09-11 14:33:31 +02:00
Jens Axboe
1badcfbd7f block: fix long lines in block/blk-iopoll.c 
Note sure why they happened in the first place, probably some bad
terminal setting.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
 2009-09-11 14:33:31 +02:00
Jens Axboe
5e605b64a1 block: add blk-iopoll, a NAPI like approach for block devices 
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 <jens.axboe@oracle.com>
 2009-09-11 14:33:31 +02:00