vduse: Use proper spinlock for IRQ injection

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[ Upstream commit 7ca26efb09 ]

The IRQ injection work used spin_lock_irq() to protect the
scheduling of the softirq, but spin_lock_bh() should be
used.

With spin_lock_irq(), we noticed delay of more than 6
seconds between the time a NAPI polling work is scheduled
and the time it is executed.

Fixes: c8a6153b6c ("vduse: Introduce VDUSE - vDPA Device in Userspace")
Cc: xieyongji@bytedance.com

Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Message-Id: <20230705114505.63274-1-maxime.coquelin@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Xie Yongji <xieyongji@bytedance.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Maxime Coquelin 2023-07-05 13:45:05 +02:00 • committed by Greg Kroah-Hartman

parent af5818c351

commit e706675bee

1 changed files with 4 additions and 4 deletions

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drivers/vdpa/vdpa_user/vduse_dev.c

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