------- Comment From niklas.schne...@ibm.com 2020-04-27 04:31 EDT-------
The commit has landed upstream in v5.7-rc3 as:
a019b36123aec9700b21ae0724710f62928a8bc1 ("net/mlx5: Fix failing fw
tracer allocation on s390")
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https://bugs.launchpad.net/bugs/1874058
Title:
[UBUNTU 20.04] mlx5: alloc_pages_nodemask stack trace
Status in Ubuntu on IBM z Systems:
Incomplete
Status in linux package in Ubuntu:
New
Bug description:
Using the mlx5 device driver on Ubuntu 20.04 (beta), the
alloc_pages_nodemask code generates a stack trace when initializing a
device. The driver tries to allocate more contiguous memory than is
allowed by the platform specific FORCE_MAX_ZONEORDER setting.
FORCE_MAX_ZONEORDER on s390x: 9
FORCE_MAX_ZONEORDER on other platforms: 11 or more
This issue only occurs on ConnectX5 devices because the mlx5_fw_tracer
code is only used for physical functions.
A fix for this has recently been pulled into David Miller's net tree as part
of a series of Mellanox fixes:
https://lore.kernel.org/netdev/20200420213606.44292-1-sae...@mellanox.com/
It hasn't landed in Linus' tree yet though
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