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| author | Steve Wise <swise@opengridcomputing.com> | 2019-02-06 13:11:49 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-02-19 20:52:19 -0700 |
| commit | 4133b013faf31fbab61d4deb626fcb4390042eba (patch) | |
| tree | b447d1d1f060082dd66aecea061c60e4193b2d42 /lib | |
| parent | 66920e1b25861d5bd99192489f6da7183529285e (diff) | |
| download | linux-4133b013faf31fbab61d4deb626fcb4390042eba.tar.gz linux-4133b013faf31fbab61d4deb626fcb4390042eba.tar.bz2 linux-4133b013faf31fbab61d4deb626fcb4390042eba.zip | |
lib/irq_poll: Support schedules in non-interrupt contexts
Do not assume irq_poll_sched() is called from an interrupt context only.
So use raise_softirq_irqoff() instead of __raise_softirq_irqoff() so it
will kick the ksoftirqd if the schedule is from a non-interrupt context.
This is required for RDMA drivers, like soft iwarp, that generate cq
completion notifications in a workqueue or kthread context. Without this
change, siw completion notifications to the ULP can take several hundred
usecs, depending on the system load.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/irq_poll.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/irq_poll.c b/lib/irq_poll.c index 86a709954f5a..2f17b488d58e 100644 --- a/lib/irq_poll.c +++ b/lib/irq_poll.c @@ -35,7 +35,7 @@ void irq_poll_sched(struct irq_poll *iop) local_irq_save(flags); list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll)); - __raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); + raise_softirq_irqoff(IRQ_POLL_SOFTIRQ); local_irq_restore(flags); } EXPORT_SYMBOL(irq_poll_sched); |