** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Changed in: linux (Ubuntu)
Assignee: Taco Screen team (taco-screen-team) => Canonical Kernel Team
(canonical-kernel-team)
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https://bugs.launchpad.net/bugs/1588468
Title:
CAPI: CGZIP AFU contexts do not receive interrupts after heavy afu
open/close
Status in linux package in Ubuntu:
Triaged
Bug description:
== Comment: #0 - Breno Henrique Leitao <bren...@br.ibm.com> - 2016-06-02
13:36:27 ==
---Problem Description---
We are developing a CAPI version of our FPGA gzip compression adapter. We use
AFU directed mode to support multiple processes. Our testcase is opening a huge
number of AFU context and sending small work-requests to the card. After n sec
we close the AFU contexts.
What we observe is that after a while we get a set of AFU contexts,
which do not see interrupts anymore. We have traced the interrupt
packet (msix I guess) to the very low level of the FPGA logic and we
strongly assume that the interrupt packet goes out. Still the Linux
kernel is not seeing the interrupt and our application times out but
the work request was successfully finished.
In order to fix this bug, the follow patches are required:
2bc79ffcbb817873cc43d63118008ab75181b73d cxl: Poll for outstanding IRQs when
detaching a context
d6776bba44d9752f6cdf640046070e71ee4bba7b cxl: Keep IRQ mappings on context
teardown
This request is for Ubuntu 16.04.1
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