diff options
| author | Eli Cohen <eli@mellanox.com> | 2016-11-27 15:18:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-26 08:24:34 +0100 |
| commit | 4db097fe49ea9dc608e614fbf46bc7463be0eb76 (patch) | |
| tree | eabf1c6940aa6e9c352f5528df829411a80f2265 /Documentation/BUG-HUNTING | |
| parent | 45f3a7eb2ca05a8cd0e56889fba96b548077f7a3 (diff) | |
IB/mlx5: Avoid system crash when enabling many VFs
commit afd02cd3a9b6c04b41d946b5d7f6e17b3fc30c6b upstream.
When enabling many VFs, the total amount of DMA mappings increase
significantly. This causes DMA allocations to take a lot of time
since they are serialized in the kernel.
As a result the driver enters into fatal condition due to
timeout and the system hangs. To recover from this we disable
MR cache for VFs.
PFs will still have a full cache and VFs cache can be manipulated
as usual after driver load.
Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters')
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/BUG-HUNTING')
0 files changed, 0 insertions, 0 deletions