https://lists.ubuntu.com/archives/kernel-team/2016-October/080298.html
** Also affects: linux (Ubuntu Yakkety)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Yakkety)
Status: New => In Progress
** Changed in: linux (Ubuntu Yakkety)
Assignee: Taco Screen team (taco-screen-team) => Tim Gardner (timg-tpi)
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https://bugs.launchpad.net/bugs/1632049
Title:
PSL data cache should be flushed before resetting CAPI adapter
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Xenial:
In Progress
Status in linux source package in Yakkety:
In Progress
Bug description:
---Problem Description---
The PSL data cache should be flushed before resetting a CAPI adapter.
If the PSL data cache holds dirty cache line when it is reset, the host
trying to access that memory when the link is down may face a Uncorrectable
Error (UE), forcing a reboot of the system.
---uname output---
Linux freak 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:40:06 UTC 2016
ppc64le ppc64le ppc64le GNU/Linux
---Additional Hardware Info---
CAPI adapter needed + AFU image using the PSL cache (e.g. afu_directed
memcpy)
Machine Type = Tuleta
---Steps to Reproduce---
There's some randomness to it, but triggering a memcpy test + card reset in
a loop can produce it:
memcpy_afu_ctx -p100 -l1000
echo 1 > /sys/class/cxl/card0/reset
Fix is already upstream under commit ID:
aaa2245ed836824f21f8e42e0ab63b1637d1cb20
"cxl: Flush PSL cache before resetting the adapter"
We would like the fix released for both 16.04 and 16.10 please.
To manage notifications about this bug go to:
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