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null_blk: change type of completion_nsec to unsigned long

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This commit at least doubles the maximum value for
completion_nsec. This helps in special cases where one wants/needs to
emulate an extremely slow I/O (for example to spot bugs).

Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Signed-off-by: Arianna Avanzini <avanzini@google.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Arianna Avanzini 2015-12-01 11:48:19 +01:00 committed by Jens Axboe
parent cf8ecc5a84
commit dbac117542
1 changed files with 2 additions and 2 deletions
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4
drivers/block/null_blk.c
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@ -132,8 +132,8 @@ static const struct kernel_param_ops null_irqmode_param_ops = {
device_param_cb(irqmode, &null_irqmode_param_ops, &irqmode, S_IRUGO);
MODULE_PARM_DESC(irqmode, "IRQ completion handler. 0-none, 1-softirq, 2-timer");
static int completion_nsec = 10000;
module_param(completion_nsec, int, S_IRUGO);
static unsigned long completion_nsec = 10000;
module_param(completion_nsec, ulong, S_IRUGO);
MODULE_PARM_DESC(completion_nsec, "Time in ns to complete a request in hardware. Default: 10,000ns");
static int hw_queue_depth = 64;