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Tue, 3 Jun 2025 22:02:03 +0800 (CST) Date: Tue, 3 Jun 2025 22:02:03 +0800 (CST) From: "David Wang" <00107082@163.com> To: "Yeoreum Yun" Cc: peterz@infradead.org, mingo@redhat.com, mingo@kernel.org, acme@kernel.org, namhyung@kernel.org, leo.yan@arm.com, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, kan.liang@linux.intel.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/1] perf/core: fix dangling cgroup pointer in cpuctx X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.14 build 20240801(9da12a7b) Copyright (c) 2002-2025 www.mailtech.cn 163com In-Reply-To: References: X-NTES-SC: AL_Qu2fCvWetksp5SCRZekXn0oTju85XMCzuv8j3YJeN500tSTX4wA4cW9GFHDV986uDAqhoAiVSRNw8OpieZNiVY7Za4YOX4w+fQJuITaH7RjT Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=GBK Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <45723708.beca.197361963d8.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:ZygvCgD3H+JbAD9oJCMTAA--.13866W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/xtbBkAZhqmg+9NnRwgAHsy X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== CkF0IDIwMjUtMDYtMDMgMjE6NDE6MzAsICJZZW9yZXVtIFl1biIgPHllb3JldW0ueXVuQGFybS5j b20+IHdyb3RlOgo+SGkgRGF2aWQsCj4KPj4gPgo+PiA+ID4gQnV0IHRvIGZpeCBpdCwgIGlzbid0 IGZvbGxvd2luZyBjaGFuZ2UgbGVzcyBhZ2dyZXNzaXZlPwo+PiA+ID4gICAgICAgICBldmVudF9z Y2hlZF9vdXQoZXZlbnQsIGN0eCk7Cj4+ID4gPiAtICAgICAgIHBlcmZfZXZlbnRfc2V0X3N0YXRl KGV2ZW50LCBtaW4oZXZlbnQtPnN0YXRlLCBzdGF0ZSkpOwo+PiA+ID4gICAgICAgICBpZiAoZmxh Z3MgJiBERVRBQ0hfR1JPVVApCj4+ID4gPiAgICAgICAgICAgICAgICAgcGVyZl9ncm91cF9kZXRh Y2goZXZlbnQpOwo+PiA+ID4gICAgICAgICBpZiAoZmxhZ3MgJiBERVRBQ0hfQ0hJTEQpCj4+ID4g PiAgICAgICAgICAgICAgICBwZXJmX2NoaWxkX2RldGFjaChldmVudCk7Cj4+ID4gPiAgICAgICAg IGxpc3RfZGVsX2V2ZW50KGV2ZW50LCBjdHgpOwo+PiA+ID4gKyAgICAgICBwZXJmX2V2ZW50X3Nl dF9zdGF0ZShldmVudCwgbWluKGV2ZW50LT5zdGF0ZSwgc3RhdGUpKTsKPj4gPgo+PiA+IElmIHBl cmZfY2hpbGRfZGV0YWNoKCkgaXMgY2FsbGVkIGZpcnN0IGFuZCBwZXJmX2V2ZW50X3NldF9zdGF0 ZSgpIGNhbGwsCj4+ID4gc2luY2UgdGhlIHBhcmVudCBpcyByZW1vdmVkIGluIHBlcmZfY2hpbGRf ZGV0YXRjZWQsCj4+ID4gSXQgd291bGQgYmUgZmFpbGVkIHRvIGFjY291bnQgdGhlIHRvdGFsX2Vu YWJsZV90aW1lIHdoaWNoIGNhY3VsYXRpbmcKPj4gPiBjaGlsZF9ldmVudCdzIGVuYWJsZV90aW1l IHRvby4KPj4KPj4gVGhhbmtzIGZvciBjbGFyaWZ5aW5nIHRoaXMsCj4+IFNvIHRoZSB3aG9sZSBw b2ludCAgaW4gY29tbWl0IGEzYzNjNjY2NyBpcyB0byBtYWtlICBwZXJmX2V2ZW50X3NldF9zdGF0 ZSgpIGhhcHBlbnMgYmVmb3JlIHBlcmZfY2hpbGRfZGV0YWNoKCksIHJpZ2h0Pwo+PiBJIGZlZWwg SSBnb3QgbG9zdCBzb21ld2hlcmUgd2hlbiBJIHJ1c2ggdG8gdGhpcyBzdWdnZXN0aW9uLiBCdXQg SSBzdGlsbCBkb24ndCB1bmRlcnN0YW5kIHdoeSBteSBwYXRjaHYxICBicmVha3MgY29tbWl0Cj4+ IGEzYzNjNjY2NywgcmVhbGx5IGNvbmZ1c2VkLgo+Cj5JIGV4cGxhaW5lZCB0aGlzIGluOgo+ICAg aHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvYWxsLzVkMTdmMWQ3LjY2NmQuMTk3MzQ4Yjc4ZDEuQ29y ZW1haWwuMDAxMDcwODJAMTYzLmNvbS8KPgo+Pj4gSWYgdGhlcmUgaXMgc3BlY2lmaWMgY2hpbGQg Y3B1IGV2ZW50IHNwZWNpZmllZCBpbiBjcHUgMC4KPj4+ICAgMS4gY3B1IDAgLT4gYWN0aXZlCj4+ PiAgIDIuIHNjaGV1bGRlZCB0byBjcHUxIC0+IGluYWN0aXZlCj4+PiAgIDMuIGNsb3NlIHRoZSBj cHUgZXZlbnQgZnJvbSBwYXJlbnQgLT4gaW5hY3RpdmUgY2xvc2UKPj4+Cj4+PiBDYW4gYmUgZmFp bGVkIHRvIGNvdW50IHRvdGFsX2VuYWJsZV90aW1lLgo+Cj4KPkNvbnNpZGVyIG9uZSBldmVudCB3 aGljaCBhdHRhY2hlZCB0byB0YXNrY3R4IHdpdGggc3BlY2lmaWMgY3B1Lgo+SW4gY2FzZSBvZiB5 b3VyIG9yaWdpbmFsIHBhdGNoIGlzIGZvciBvbmx5ICJERVRBQ0hfRVhJVCIgY2FzZS4KPkhlcmUg d2hhdCBJIG1lYW4sIHRoZSBldmVudCBpcyAiY2xvc2VkIi4KPkluIHRoaXMgY2FzZSwgYmFzZWQg b24geW91ciBwYXRjaCwgaXQgZG9lc24ndCBjYWxsIHRoZSBwZXJmX2V2ZW50X3NldF9zdGF0ZSgp Cj5iZWZvcmUgbGlzdF9kZWxfZXZlbnQoKSwgYnV0IHBlcmZfZXZlbnRfc2V0X3N0YXRlKCkgaXMg Y2FsbGVkIGFmdGVyIGxpc3RfZGVsX2V2ZW50KCkuCgpEbyB5b3UgbWVhbiBpbiB0aGlzIGNhc2Us IHRoZSBldmVudCBpcyBub3QgcGFzc2VkIHRvIHBlcmZfZXZlbnRfZXhpdF9ldmVudCgpPwpCZWNh dXNlIGluIG15IG1pbmQsIGFzIGxvbmcgYXMgYSBldmVudCByZWFjaCBwZXJmX2V2ZW50X2V4aXRf ZXZlbnQsIERFVEFDSF9FWElUIGZsYWcgd291bGQgYWx3YXlzIGJlIHNldC4KcGVyZl9ldmVudF9l eGl0X2V2ZW50KCkKICAgLS0tPiBwZXJmX3JlbW92ZV9mcm9tX2NvbnRleHQoZXZlbnQsIGRldGFj aF9mbGFncyB8IERFVEFDSF9FWElUKTsgIDwtLS0KICAgICAgICAgICAgLS0tPiBfX3BlcmZfcmVt b3ZlX2Zyb21fY29udGV4dAogICAgICAgICAgICAgICAgICAgIC0tLS0+IHBlcmZfZXZlbnRfc2V0 X3N0YXRlICAoREVUQUNIX0VYSVQgaXMgYWx3YXlzIHNldCBpbiB0aGlzIGNhbGwgcGF0aCkKICAg ICAgICAgICAgICAgICAgICAtLS0tPiBsaXN0X2RlbF9ldmVudAoKU28gSSBhbSBzdGlsbCBjb25m dXNlZCwgZXZlbiB3aXRoIGNwdSBzd2l0Y2gsIHRoZSBERVRBQ0hfRVhJVCBmbGFnIGlzIHN0aWxs IHRoZXJlLgpDb3VsZCB5b3UgZXhwbGFpbiBpdCB3aXRoIGEgY2FsbGNoYWluPwoKVGhhbmtzCkRh dmlkCgo+Cj5UaGFua3MKPgo+LS0KPlNpbmNlcmVseSwKPlllb3JldW0gWXVuCg==