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| author | Dave Jiang <dave.jiang@intel.com> | 2021-04-20 12:00:34 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-04-23 23:08:45 +0530 |
| commit | a16104617d212d4b482568847b25172972b87e60 (patch) | |
| tree | e553dc21a2522574c21ade3563e6950b20d009e6 /Documentation/ABI | |
| parent | 53b2ee7f637c4f1fa2f50dbdb210088e30c11d2b (diff) | |
| download | linux-a16104617d212d4b482568847b25172972b87e60.tar.gz | |
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 <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/161894523436.3210025.1834640110556139277.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/ABI')
0 files changed, 0 insertions, 0 deletions