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Tue, 3 Jun 2025 14:47:25 +0800 (CST) Date: Tue, 3 Jun 2025 14:47:25 +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: <19514ed5.5692.19734522326.Coremail.00107082@163.com> X-NTES-SC: AL_Qu2fCvWYvEov4yGbZekZnEYQheY4XMKyuPkg1YJXOp80iCXQ3wodeXBxJkTkwcOOJiWSvxe8aSZS7+RTe4BFYbChV4TaPaKSjKDs55PotH6X Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=GBK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <5d17f1d7.666d.197348b78d1.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:iigvCgD3L9t9mj5o9qwSAA--.26411W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/xtbBkBJhqmg+kwHr9AAFsX X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== CkF0IDIwMjUtMDYtMDMgMTQ6Mzk6MzMsICJZZW9yZXVtIFl1biIgPHllb3JldW0ueXVuQGFybS5j b20+IHdyb3RlOgo+PiA+ID4gYXR0YWNoX3N0YXRlIGRvZXNuJ3QgcmVsYXRlZCBmb3IgZXZlbnQt PnN0YXRlIGNoYW5nZS4KPj4gPiA+IGlmIG9uZSBldmVudCBhbHJlYWR5IGNsZWFyZWQgUEVSRl9B VFRBQ0hfQ09OVEVYVCwgdGhhdCBldmVudCBpcyBjYWxsZWQKPj4gPiA+IHZpYSBsaXN0X2RlbF9l dmVudCgpCj4+ID4KPj4gPiBNYXliZSB0aGlzIGNvbmNlcm4gY291bGQgYmUgY2xhcmlmaWVkLCB3 aGF0IGFib3V0IG90aGVyIHN1YnRsZSBpbXBhY3RzLgo+PiA+IFRoZSBjaGFuZ2Ugc2hvdWxkIGJl IHRob3JvdWdoIHJldmlld2VkLCBpZiB5b3Ugd2FudCB0byBwdXNoIGl0IGZ1cnRoZXIuCj4+ID4K Pj4gPiBJdCB0YWtlcyBtZSBtb3JlIHRoYW4gYSBtb250aCB0byBmaWd1cmUgb3V0IGEgcHJvY2Vk dXJlIHRvIHJlcHJvZHVjZSB0aGUga2VybmVsIHBhbmljIGJ1ZywKPj4gPiBJdCBpcyAganVzdCB2 ZXJ5IGhhcmQgdG8gY2FwdHVyZSBhIGJ1ZyBoYXBwZW5zIGluIHJhcmUgc2l0dWF0aW9uLgo+PiA+ Cj4+ID4gQW5kIHlvdXIgcGF0Y2ggaGFzIGEgZ2xvYmFsIGltcGFjdCwgaXQgY2hhbmdlcyBiZWhh dmlvciB1bm5lY2Vzc2FyaWx5Lgo+Pgo+PiBUQkgsIHRoaXMgcGF0Y2gganVzdCBjaGFuZ2Ugb2Yg dGltZSBvZiAiZXZlbnQtPnN0YXRlIiB3aGlsZSBkb2luZywKPj4gQXMgbXkgYmFkIG1pc3MgdGhl IGRpc2FibGUgY2dvcnVwIHBlcmYuCj4+IEkgdGhpbmsgdGhlcmUgc2VlbXMgbm8gb3RoZXIgc2lk ZSBlZmZlY3QgZm9yIGNoYW5pbmcgc3RhdGUgd2hpbGUgaW4KPj4gcmVtb3ZpbmcgZXZlbnQuCj4+ IEJ1dCwgTGV0J3Mgd2FpdCBmb3Igb3RoZXIgcGVvcGxlJ3MgcmV2aWV3Lgo+Pgo+PiA+ID4KPj4g PiA+IEFsc28sIHlvdXIgcGF0Y2ggY291bGRuJ3Qgc29sdmUgYSBwcm9ibGVtIGRlc2NyaWJlIGlu Cj4+ID4gPiBjb21taXQgYTNjM2M2NjY3KCJwZXJmL2NvcmU6IEZpeCBjaGlsZF90b3RhbF90aW1l X2VuYWJsZWQgYWNjb3VudGluZyBidWcgYXQgdGFzayBleGl0IikKPj4gPiA+IGZvciBJTkNBVElW RSBldmVudCdzIHRvdGFsX2VuYWJsZV90aW1lLgo+PiA+Cj4+ID4gSSBkbyBub3QgdGhpbmsgc28u Cj4+ID4gQ29ycmVjdCBtZSBpZiBJIGFtIG1ha2luZyBzaWxseSAgbWlzdGFrZXMsCj4+ID4gVGhl IHBhdGNoLCBodHRwczovL2xvcmUua2VybmVsLm9yZy9sa21sLzIwMjUwNjAzMDMyNjUxLjM5ODgt MS0wMDEwNzA4MkAxNjMuY29tLwo+PiA+IGNhbGxzIHBlcmZfZXZlbnRfc2V0X3N0YXRlKCkgYmFz ZWQgb24gREVUQUNIX0VYSVQgZmxhZywgd2hpY2ggY292ZXIgdGhlIElOQUNUSVZFIHN0YXRlLCBy aWdodD8KPj4gPiBJZiBERVRBQ0hfRVhJVCBpcyBub3QgdXNlZCBmb3IgdGhpcyBwdXJwb3NlPyBU aGVuIHdoeSBzaG91bGQgaXQgZXhpc3QgYXQgdGhlIGZpcnN0IHBsYWNlPwo+PiA+IEkgdGhpbmsg SSBkb2VzIG5vdCByZXZlcnQgdGhlIHB1cnBvc2Ugb2YgY29tbWl0IGEzYzNjNjY2Ny4uLi4uQnV0 IEkgY291bGQgYmUgd3JvbmcKPj4gPiBXb3VsZCB5b3Ugc2hvdyBhIGNhbGwgcGF0aCB3aGVyZSBE RVRBQ0hfRVhJVCBpcyBub3Qgc2V0LCBidXQgdGhlIGNoYW5nZXMgaW4gY29tbWl0IGEzYzNjNjY2 NyBpcyBzdGlsbCBuZWVkZWQ/Cj4+Cj4+IFNvcnJ5IGZvciBteSBiYWQgZXhwbGFpbmF0aW9uIHdp dGhvdXQgZGV0YWlsLgo+PiBUaGluayBhYm91dCBjcHUgc3BlY2lmaWMgZXZlbnQgYW5kIGNsb3Nl ZCBieSB0YXNrLgo+PiBJZiB0aGVyZSBpcyBzcGVjaWZpYyBjaGlsZCBjcHUgZXZlbnQgc3BlY2lm aWVkIGluIGNwdSAwLgo+PiAgIDEuIGNwdSAwIC0+IGFjdGl2ZQo+PiAgIDIuIHNjaGV1bGRlZCB0 byBjcHUxIC0+IGluYWN0aXZlCj4+ICAgMy4gY2xvc2UgdGhlIGNwdSBldmVudCBmcm9tIHBhcmVu dCAtPiBpbmFjdGl2ZSBjbG9zZQo+Pgo+PiBDYW4gYmUgZmFpbGVkIHRvIGNvdW50IHRvdGFsX2Vu YWJsZV90aW1lLgo+Pgo+PiBUaGFua3MuCj4KPkFuZCBhbHNvLCBjb25zaWRlcmluZyB0aGUgeW91 ciBwYXRjaCwgZm9yIERFVEFDSF9FWElUIGNhc2UsCj5JZiBpdCBjaGFuZ2VzIHRoZSBzdGF0ZSBi ZWZvcmUgbGlzdF9kZWxfZXZlbnQoKSB0aGF0IHdvdWxkbid0IGRpc2FibGUKPnJlbGF0ZWQgdG8g dGhlIGNncm91cC4gU28gaXQgd291bGQgbWFrZSBjcHVjdHgtPmNncnAgcG9pbnRlciBjb3VsZCBi ZSBkYW5nbGVkCj5hcyBwYXRjaCBkZXNjcmliZS4uLgoKTm8sIEkgZG9uJ3QgdGhpbmsgc28uCmNo YW5nZSBzdGF0ZSBiZWZvcmUgbGlzdF9kZWxfZXZlbnQoKSwgdGhpcyBpcyB0aGUgc2FtZSBiZWhh dmlvciBiZWZvcmUgY29tbWl0IGEzYzNjNjY2NywgcmlnaHQ/CkFuZCBubyBzdWNoIGtlcm5lbCBw YW5pYyBoYXBwZW5lZCAgYmVmb3JlIGNvbW1pdCBhM2MzYzY2NjcuCgo+Cj4+IC0tCj4+IFNpbmNl cmVseSwKPj4gWWVvcmV1bSBZdW4KPgo+LS0KPlNpbmNlcmVseSwKPlllb3JldW0gWXVuCg==