On Fri, May 10, 2024 at 06:16:46PM +0100, Jonathan Cameron wrote: > > https://git.kernel.org/pub/scm/linux/kernel/git/jic23/cxl-staging.git/log/?h=arm-numa-fixes > Thank you :) > I've run out of time to sort out cover letters and things + just before the > merge > window is never a good time get anyone to pay attention to potentially > controversial > patches. So for now I've thrown up a branch on kernel.org with Robert's > series of fixes of related code (that's queued in the ACPI tree for the merge > window) > and Dan Williams (from several years ago) + my additions that 'work' (lightly > tested) > on qemu/arm64 with the generic port patches etc. > > I'll send out an RFC in a couple of weeks. In meantime let me know if you > run into any problems or have suggestions to improve them. > > Jonathan > With the latest commit(d077bf9) in the 'arm-numa-fixes', the qemu virt could create a cxl region with a new numa node (node 2) just like x86. At this stage(the first time to create cxl region), everything works fine.
However, if I use below commands to delete the created cxl region: `daxctl offline-memory dax0.0` `cxl disable-region region0` `cxl destroy-region region0` and then recreate it by `cxl create-region -d decoder0.0 -t ram`, the kernel could not create the numa node2 again, and the kernel will print: [ 589.458971] Fallback order for Node 0: 0 1 [ 589.459136] Fallback order for Node 1: 1 0 [ 589.459175] Fallback order for Node 2: 0 1 [ 589.459213] Built 2 zonelists, mobility grouping on. Total pages: 1009890 [ 589.459284] Policy zone: Normal Meanwhile, the qemu reports that: "qemu-system-aarch64: virtio: bogus descriptor or out of resources" Many thanks Yuquan
