CAPI: CGZIP AFU contexts do not receive interrupts after heavy afu open/close

[bugproxy]

== Comment: #0 - Breno Henrique Leitao <email address hidden> - 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

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2016-06-02 13:50 EDT-------
*** Bug 135949 has been marked as a duplicate of this bug. ***

[Tim Gardner (timg-tpi)]

https://lists.ubuntu.com/archives/kernel-team/2016-June/077906.html

[Kamal Mostafa (kamalmostafa)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-xenial' to 'verification-done-xenial'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Vaibhav (vaibhav-l)]

Hi Canonical,

We have successfully verified this fix in xenial-proposed kernel. So tagging this bug as 'verification-done-xenial'

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-28.47

---------------
linux (4.4.0-28.47) xenial; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1595874

  * Linux netfilter local privilege escalation issues (LP: #1595350)
    - netfilter: x_tables: don't move to non-existent next rule
    - netfilter: x_tables: validate targets of jumps
    - netfilter: x_tables: add and use xt_check_entry_offsets
    - netfilter: x_tables: kill check_entry helper
    - netfilter: x_tables: assert minimum target size
    - netfilter: x_tables: add compat version of xt_check_entry_offsets
    - netfilter: x_tables: check standard target size too
    - netfilter: x_tables: check for bogus target offset
    - netfilter: x_tables: validate all offsets and sizes in a rule
    - netfilter: x_tables: don't reject valid target size on some architectures
    - netfilter: arp_tables: simplify translate_compat_table args
    - netfilter: ip_tables: simplify translate_compat_table args
    - netfilter: ip6_tables: simplify translate_compat_table args
    - netfilter: x_tables: xt_compat_match_from_user doesn't need a retval
    - netfilter: x_tables: do compat validation via translate_table
    - netfilter: x_tables: introduce and use xt_copy_counters_from_user

  * Linux netfilter IPT_SO_SET_REPLACE memory corruption (LP: #1555338)
    - netfilter: x_tables: validate e->target_offset early
    - netfilter: x_tables: make sure e->next_offset covers remaining blob size
    - netfilter: x_tables: fix unconditional helper

linux (4.4.0-27.46) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1594906

  * Support Edge Gateway's Bluetooth LED (LP: #1512999)
    - Revert "UBUNTU: SAUCE: Bluetooth: Support for LED on Marvell modules"

linux (4.4.0-26.45) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1594442

  * linux: Implement secure boot state variables (LP: #1593075)
    - SAUCE: UEFI: Add secure boot and MOK SB State disabled sysctl

  * failures building userspace packages that include ethtool.h (LP: #1592930)
    - ethtool.h: define INT_MAX for userland

linux (4.4.0-25.44) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1591289

  * Xenial update to v4.4.13 stable release (LP: #1590455)
    - MIPS64: R6: R2 emulation bugfix
    - MIPS: math-emu: Fix jalr emulation when rd == $0
    - MIPS: MSA: Fix a link error on `_init_msa_upper' with older GCC
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    - MIPS: Avoid using unwind_stack() with usermode
    - MIPS: Fix siginfo.h to use strict posix types
    - MIPS: Fix uapi include in exported asm/siginfo.h
    - MIPS: Fix watchpoint restoration
    - MIPS: Flush highmem pages in __flush_dcache_page
    - MIPS: Handle highmem pages in __update_cache
    - MIPS: Sync icache & dcache in set_pte_at
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    - MIPS: Fix MSA ld_*/st_* asm macros to use PTR_ADDU
    - MIPS: Prevent "restoration" of MSA c...