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| author | Dave Jiang <[email protected]> | 2021-04-20 19:00:34 +0000 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2021-04-23 17:38:45 +0000 |
| commit | a16104617d212d4b482568847b25172972b87e60 (patch) | |
| tree | e553dc21a2522574c21ade3563e6950b20d009e6 /tools/perf/scripts/python/net_dropmonitor.py | |
| parent | dmaengine: idxd: device cmd should use dedicated lock (diff) | |
| download | kernel-a16104617d212d4b482568847b25172972b87e60.tar.gz kernel-a16104617d212d4b482568847b25172972b87e60.zip | |
dmaengine: idxd: remove MSIX masking for interrupt handlers
Remove interrupt masking and just let the hard irq handler keep
firing for new events. This is less of a performance impact vs
the MMIO readback inside the pci_msi_{mask,unmas}_irq(). Especially
with a loaded system those flushes can be stuck behind large amounts
of MMIO writes to flush. When guest kernel is running on top of VFIO
mdev, mask/unmask causes a vmexit each time and is not desirable.
Suggested-by: Dan Williams <[email protected]>
Signed-off-by: Dave Jiang <[email protected]>
Reviewed-by: Dan Williams <[email protected]>
Link: https://lore.kernel.org/r/161894523436.3210025.1834640110556139277.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/net_dropmonitor.py')
0 files changed, 0 insertions, 0 deletions