crypto/qat: fix not included release note for coalescing feature
Checks
Commit Message
This patch fixes not included in original patch release note
Fixes: 6cde900bd59d ("common/qat: remove tail write coalescing")
Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
---
doc/guides/rel_notes/release_20_02.rst | 9 +++++++++
1 file changed, 9 insertions(+)
Comments
> -----Original Message-----
> From: Kusztal, ArkadiuszX <arkadiuszx.kusztal@intel.com>
> Sent: Friday, January 31, 2020 7:29 AM
> To: dev@dpdk.org
> Cc: akhil.goyal@nxp.com; Trahe, Fiona <fiona.trahe@intel.com>; Kusztal, ArkadiuszX
> <arkadiuszx.kusztal@intel.com>
> Subject: [PATCH] crypto/qat: fix not included release note for coalescing feature
>
> This patch fixes not included in original patch release note
>
> Fixes: 6cde900bd59d ("common/qat: remove tail write coalescing")
>
> Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
@@ -184,6 +184,15 @@ Removed Items
the Technical Board decided to disable all the kernel modules
by default from 20.02 version.
+* **Removed coalescing feature from Intel QuickAssist Technology (QAT) PMD.**
+
+ The internal tail write coalescing feature was removed as not compatible with
+ dual-thread feature. It was replaced with a threshold feature. At busy times
+ if only a small number of packets can be enqueued, each enqueue causes
+ an expensive MMIO write. These MMIO write occurrences can be optimised by using
+ the new threshold parameter on process start. Please see qat documentation for
+ more details.
+
API Changes
-----------