Re: [RFC PATCH v2 2/6] cxl/core: introduce cxl_mem_report_poison()

[Dan Williams <dan.j.williams@intel.com>]

Shiyang Ruan wrote:
> If poison is detected(reported from cxl memdev), OS should be notified to
> handle it. So, introduce this helper function for later use:
>   1. translate DPA to HPA;
>   2. enqueue records into memory_failure's work queue;
> 
> Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>

This patch is too small, it needs the corresponding caller to make sense
of the proposed change.

> ---
> 
> Currently poison injection from debugfs always create a 64-bytes-length
> record, which is fine.  But the injection from qemu's QMP API:
> qmp_cxl_inject_poison() could create a poison record contains big length,
> which may cause many many times of calling memory_failure_queue().
> Though the MEMORY_FAILURE_FIFO_SIZE is 1 << 4, it seems not enougth.

What matters is what devices do in practice, the kernel should not be
worried about odd corner cases that only exist in QEMU injection
scenarios.