On 31/10/2021 23:52, Bart Van Assche wrote:
On 10/31/21 16:19, Justin Piszcz wrote:
Diff between 5.14 and 5.15 .config files-- could it be something to do
with
CONFIG_IOMMU_DEFAULT_DMA_LAZY=y?
On x86 (intel or amd) iommu we were using lazy mode previously, but just
did not have a config option, so should not make a difference.
That's hard to say. Is CONFIG_MAGIC_SYSRQ enabled? If not, please enable
it and hit Alt-Printscreen-t (dump task list; see also
Documentation/admin-guide/sysrq.rst) and share the contents of the
kernel log. If that would not be convenient, please try to bisect this
issue.
