On Wed, Jan 15, 2020 at 04:44:29PM +0000, Suzuki Kuruppassery Poulose wrote:
Hi Greg,
On 15/01/2020 15:11, Greg KH wrote:
On Thu, Jan 09, 2020 at 02:36:17PM +0000, Suzuki Kuruppassery Poulose wrote:
On 09/01/2020 14:35, Sasha Levin wrote:
On Wed, Jan 08, 2020 at 11:05:40AM +0000, Suzuki K Poulose wrote:
[ Upstream commit 730766bae3280a25d40ea76a53dc6342e84e6513 ]
During a perf session we try to allocate buffers on the "node" associated
with the CPU the event is bound to. If it is not bound to a CPU, we
use the current CPU node, using smp_processor_id(). However this is
unsafe
in a pre-emptible context and could generate the splats as below :
BUG: using smp_processor_id() in preemptible [00000000] code: perf/2544
Use NUMA_NO_NODE hint instead of using the current node for events
not bound to CPUs.
Fixes: 2997aa4063d97fdb39 ("coresight: etb10: implementing AUX API")
Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx> # v4.9 to v4.19
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20190620221237.3536-5-mathieu.poirier@xxxxxxxxxx
I've queued this for 4.9-4.19. There was a simple conflict on 4.9 which
also had to be resolved.
Thanks Sasha !
Note, these had to all be dropped as they broke the build :(
So can you please send us patches that at least build? :)
Do you have a build failure log ? I did build test it before sending it
over. I tried it again on 4.9, 4.14 and 4.19. I don't hit any build
failures here.
Please could you share the log if you have it handy ?
It was in the stable -rc review emails, I don't have it handy, sorry.
greg k-h