This is a note to let you know that I've just added the patch titled perf intel-pt: Fix sync state when a PSB (synchronization) packet is found to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: perf-intel-pt-fix-sync-state-when-a-psb-synchronization-packet-is-found.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ad106a26aef3a95ac7ca88d033b431661ba346ce Mon Sep 17 00:00:00 2001 From: Adrian Hunter <adrian.hunter@xxxxxxxxx> Date: Fri, 10 Dec 2021 18:22:58 +0200 Subject: perf intel-pt: Fix sync state when a PSB (synchronization) packet is found From: Adrian Hunter <adrian.hunter@xxxxxxxxx> commit ad106a26aef3a95ac7ca88d033b431661ba346ce upstream. When syncing, it may be that branch packet generation is not enabled at that point, in which case there will not immediately be a control-flow packet, so some packets before a control flow packet turns up, get ignored. However, the decoder is in sync as soon as a PSB is found, so the state should be set accordingly. Fixes: f4aa081949e7b6 ("perf tools: Add Intel PT decoder") Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v5.15+ Link: https://lore.kernel.org/r/20211210162303.2288710-3-adrian.hunter@xxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -3607,7 +3607,7 @@ static int intel_pt_sync(struct intel_pt } decoder->have_last_ip = true; - decoder->pkt_state = INTEL_PT_STATE_NO_IP; + decoder->pkt_state = INTEL_PT_STATE_IN_SYNC; err = intel_pt_walk_psb(decoder); if (err) Patches currently in stable-queue which might be from adrian.hunter@xxxxxxxxx are queue-5.15/perf-intel-pt-fix-some-pge-packet-generation-enable-control-flow-packets-usage.patch queue-5.15/perf-intel-pt-fix-intel_pt_fup_event-assumptions-about-setting-state-type.patch queue-5.15/perf-intel-pt-fix-next-err-value-walking-trace.patch queue-5.15/perf-intel-pt-fix-error-timestamp-setting-on-the-decoder-error-path.patch queue-5.15/perf-intel-pt-fix-state-setting-when-receiving-overflow-ovf-packet.patch queue-5.15/perf-intel-pt-fix-sync-state-when-a-psb-synchronization-packet-is-found.patch queue-5.15/perf-intel-pt-fix-missing-instruction-events-with-q-option.patch