From: sashiko-bot@kernel.org
To: "Arnaldo Carvalho de Melo" <acme@kernel.org>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 12/12] perf mem record: Use the IBS swfilt filter when available
Date: Wed, 16 Sep 2026 12:00:31 +0000 [thread overview]
Message-ID: <20260916120031.A06381F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260916114740.48230-13-acme@kernel.org>
> From: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> IBS events with exclude_{user,kernel} bits, as used in per-thread mode
> when kernel samples are not allowed, are rejected by the kernel on
> hardware without the privilege filter, so a per-thread 'perf mem
> record' fails:
>
> $ perf mem record -o /dev/null -- true
> Error:
> Failure to open event 'ibs_op/ldlat=0/u' on PMU 'ibs_op' which will be removed.
> Invalid event (ibs_op/ldlat=0/u) in per-thread mode, enable system wide with '-a'.
>
> Kernel v6.14 added swfilt, a software privilege filter that makes those
> events usable per-thread, exposed as the 'swfilt' format term
> (d29e744c71673a71 "perf/x86: Relax privilege filter restriction on AMD
> [ ... ]
> ("swfilt=1"), that the old 'ldlat=0' check would reject.
>
> Suggested-by: Namhyung Kim <namhyung@kernel.org>
> Assisted-by: LLM
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260916114740.48230-1-acme@kernel.org?part=12
next prev parent reply other threads:[~2026-09-16 12:00 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 11:47 [PATCH v6 0/12] perf tools: Annotate fixes, stdio progress indication, debuginfo-client in more places Arnaldo Carvalho de Melo
2026-09-16 11:47 ` [PATCH 01/12] perf test: Skip data_type_profiling when the PMU cannot record memory events Arnaldo Carvalho de Melo
2026-09-16 11:53 ` sashiko-bot
2026-09-16 11:47 ` [PATCH 02/12] perf debuginfo: Fetch debuginfo keyed by build ID using debuginfod Arnaldo Carvalho de Melo
2026-09-16 11:57 ` sashiko-bot
2026-09-16 17:59 ` Ian Rogers
2026-09-16 19:02 ` Arnaldo Carvalho de Melo
2026-09-16 21:28 ` Ian Rogers
2026-09-16 18:42 ` Namhyung Kim
2026-09-16 11:47 ` [PATCH 03/12] perf config: Move perf_config__set_variable() to util/config.c Arnaldo Carvalho de Melo
2026-09-16 12:01 ` sashiko-bot
2026-09-16 11:47 ` [PATCH 04/12] perf debuginfo: Let the user skip and disable debuginfod fetches Arnaldo Carvalho de Melo
2026-09-16 11:59 ` sashiko-bot
2026-09-16 18:53 ` Namhyung Kim
2026-09-16 21:27 ` Arnaldo Carvalho de Melo
2026-09-16 11:47 ` [PATCH 05/12] perf debuginfo: Show the debuginfod fetch progress and keys in the TUI Arnaldo Carvalho de Melo
2026-09-16 12:00 ` sashiko-bot
2026-09-16 11:47 ` [PATCH 06/12] perf symbol: Fall back to fetching the vmlinux by build ID Arnaldo Carvalho de Melo
2026-09-16 12:05 ` sashiko-bot
2026-09-16 11:47 ` [PATCH 07/12] perf annotate-data: Show the sample count in the data-type browser Arnaldo Carvalho de Melo
2026-09-16 11:55 ` sashiko-bot
2026-09-16 21:28 ` Namhyung Kim
2026-09-22 12:52 ` Arnaldo Carvalho de Melo
2026-09-16 11:47 ` [PATCH 08/12] perf report: Add --progress option Arnaldo Carvalho de Melo
2026-09-16 11:57 ` sashiko-bot
2026-09-16 11:47 ` [PATCH 09/12] perf scripts: Add perf-stuck, to tell where a running perf is stuck Arnaldo Carvalho de Melo
2026-09-16 12:00 ` sashiko-bot
2026-09-16 11:47 ` [PATCH 10/12] perf annotate-data: Resolve type DIEs in the debug file they came from Arnaldo Carvalho de Melo
2026-09-16 12:01 ` sashiko-bot
2026-09-16 21:44 ` Namhyung Kim
2026-09-17 14:07 ` Arnaldo Carvalho de Melo
2026-09-16 11:47 ` [PATCH 11/12] perf mem record: Request PERF_SAMPLE_CPU by default Arnaldo Carvalho de Melo
2026-09-16 12:06 ` sashiko-bot
2026-09-16 21:50 ` Namhyung Kim
2026-09-16 11:47 ` [PATCH 12/12] perf mem record: Use the IBS swfilt filter when available Arnaldo Carvalho de Melo
2026-09-16 12:00 ` sashiko-bot [this message]
2026-09-16 21:59 ` Namhyung Kim
2026-09-18 3:35 ` Ravi Bangoria
2026-09-18 15:44 ` Arnaldo Carvalho de Melo
2026-09-19 2:38 ` Ravi Bangoria
2026-09-16 22:27 ` [PATCH v6 0/12] perf tools: Annotate fixes, stdio progress indication, debuginfo-client in more places Namhyung Kim
2026-09-17 9:04 ` Arnaldo Melo
-- strict thread matches above, loose matches on Subject: below --
2026-09-16 18:32 Arnaldo Carvalho de Melo
2026-09-16 18:32 ` [PATCH 12/12] perf mem record: Use the IBS swfilt filter when available Arnaldo Carvalho de Melo
2026-09-16 18:43 ` sashiko-bot
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