issue: 3781322 Fix for 100% CPU load

[iftahl]

Split poll_sn to poll_sn_rx and poll_sn_tx. Required after splitting cq to cq_rx and cq_tx.

Change type

What kind of change does this PR introduce?

• [x] Bugfix
• [ ] Feature
• [ ] Code style update
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Tests
• [ ] Other

Check list

• [ ] Code follows the style de facto guidelines of this project
• [ ] Comments have been inserted in hard to understand places
• [ ] Documentation has been updated (if necessary)
• [ ] Test has been added (if possible)

[pasis]

Do we need these poll_sn? In most cases we have to create fake variables on stack just to satisfy such API. If it's necessary in some specific cases, probably we can provide poll_sn only in those cases?

[iftahl]

Do we need these poll_sn? In most cases we have to create fake variables on stack just to satisfy such API. If it's necessary in some specific cases, probably we can provide poll_sn only in those cases?

maybe we can do something to optimize it, but im not really familiar with all the flows. but when we split cq_mgr into 2 different classes, we needed to split also the poll_sn.

[galnoam]

@AlexanderGrissik, please give it priority. Thanks!