Re: [PATCH v3 02/14] perf/ring_buffer: stop using PG_private as AUX page high-order marker

[David Hildenbrand (Arm)]

On 9/8/26 04:56, Zi Yan wrote:
> A high-order AUX page sets PG_private on its first page and stores the
> order in first_page->private. Stop using PG_private and check
> first_page->private for AUX page order only in the ring buffer and its
> users. This is fine because page->private is 0 for order-0 AUX pages,
> matching the page order.
> 
> It prepares for a future commit that remove PG_private.
> 
> No functional change intended.
> 
> Assisted-by: Claude:claude-opus-4-8
> Assisted-by: Codex:gpt-5
> To: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> To: Ingo Molnar <mingo@xxxxxxxxxx>
> To: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> To: Namhyung Kim <namhyung@xxxxxxxxxx>
> To: Thomas Gleixner <tglx@xxxxxxxxxx>
> To: Borislav Petkov <bp@xxxxxxxxx>
> To: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> To: x86@xxxxxxxxxx
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
> Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
> Cc: Ian Rogers <irogers@xxxxxxxxxx>
> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Cc: James Clark <james.clark@xxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: linux-perf-users@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Acked-by: Usama Arif <usama.arif@xxxxxxxxx>
> Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
> ---

I recall having almost the exact same patch lying around at some point, so LGTM :)

Acked-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>

-- 
Cheers,

David