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([2a00:1098:3142:14:3110:d736:2a7:6aff]) by smtp.gmail.com with ESMTPSA id g10-20020adfa58a000000b0020e60baffd1sm6477332wrc.52.2022.05.23.04.01.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 May 2022 04:01:03 -0700 (PDT) Message-ID: Date: Mon, 23 May 2022 12:01:03 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: vchiq: Performance regression since 5.18-rc1 To: Stefan Wahren , paulmck@kernel.org Cc: Marcelo Tosatti , Andrew Morton , Nicolas Saenz Julienne , Borislav Petkov , Minchan Kim , Mel Gorman , Juri Lelli , Thomas Gleixner , Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linux ARM , regressions@lists.linux.dev, riel@surriel.com, viro@zeniv.linux.org.uk References: <77d6d498-7dd9-03eb-60f2-d7e682bb1b20@i2se.com> <20220521234616.GO1790663@paulmck-ThinkPad-P17-Gen-1> <20220523044818.GS1790663@paulmck-ThinkPad-P17-Gen-1> <58cb7fbb-d317-83e6-0427-d3f3944b24b8@raspberrypi.com> From: Phil Elwell In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220523_040106_830242_0BD92E1B X-CRM114-Status: GOOD ( 18.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgU3RlZmFuLAoKT24gMjMvMDUvMjAyMiAxMTo0OCwgU3RlZmFuIFdhaHJlbiB3cm90ZToKPiBI aSBQaGlsLAo+IAo+IEFtIDIzLjA1LjIyIHVtIDExOjI5IHNjaHJpZWIgUGhpbCBFbHdlbGw6Cj4+ IEhpIFN0ZWZhbiwKPj4KPj4gT24gMjMvMDUvMjAyMiAwNzoxOSwgU3RlZmFuIFdhaHJlbiB3cm90 ZToKPj4+IEhpIFBhdWwsCj4+Pgo+Pj4gQW0gMjMuMDUuMjIgdW0gMDY6NDggc2NocmllYiBQYXVs IEUuIE1jS2VubmV5Ogo+Pj4+IE9uIFN1biwgTWF5IDIyLCAyMDIyIGF0IDA1OjExOjM2UE0gKzAy MDAsIFN0ZWZhbiBXYWhyZW4gd3JvdGU6Cj4+Pj4+IEhpIFBhdWwsCj4+Pj4+Cj4+Pj4+IEFtIDIy LjA1LjIyIHVtIDAxOjQ2IHNjaHJpZWIgUGF1bCBFLiBNY0tlbm5leToKPj4+Pj4+IE9uIFN1biwg TWF5IDIyLCAyMDIyIGF0IDAxOjIyOjAwQU0gKzAyMDAsIFN0ZWZhbiBXYWhyZW4gd3JvdGU6Cj4+ Pj4+Pj4gSGksCj4+Pj4+Pj4KPj4+Pj4+PiB3aGlsZSB0ZXN0aW5nIHRoZSBzdGFnaW5nL3ZjMDRf c2VydmljZXMvaW50ZXJmYWNlL3ZjaGlxX2FybSBkcml2ZXIgd2l0aCBteQo+Pj4+Pj4+IFJhc3Bi ZXJyeSBQaSAzIEIrIChtdWx0aV92N19kZWZjb25maWcpIGkgbm90aWNlZCBhIGh1Z2UgcGVyZm9y bWFuY2UKPj4+Pj4+PiByZWdyZXNzaW9uIHNpbmNlIFtmZjA0MmY0YTliMDUwODk1YTQyY2FlODkz Y2MwMWZhMmNhODFiOTVjXSBtbToKPj4+Pj4+PiBscnVfY2FjaGVfZGlzYWJsZTogcmVwbGFjZSB3 b3JrIHF1ZXVlIHN5bmNocm9uaXphdGlvbiB3aXRoIHN5bmNocm9uaXplX3JjdQo+Pj4+Pj4+Cj4+ Pj4+Pj4gVXN1YWxseSBpIHJ1biAidmNoaXFfdGVzdCAtZiAxIiB0byBzZWUgdGhlIGRyaXZlciBp cyBzdGlsbCB3b3JraW5nIFsxXS4KPj4+Pj4+Pgo+Pj4+Pj4+IEJlZm9yZSBjb21taXQ6Cj4+Pj4+ Pj4KPj4+Pj4+PiByZWFswqDCoMKgIDBtMSw1MDBzCj4+Pj4+Pj4gdXNlcsKgwqDCoCAwbTAsMDY4 cwo+Pj4+Pj4+IHN5c8KgwqDCoCAwbTAsODQ2cwo+Pj4+Pj4+Cj4+Pj4+Pj4gQWZ0ZXIgY29tbWl0 Ogo+Pj4+Pj4+Cj4+Pj4+Pj4gcmVhbMKgwqDCoCA3bTExLDQ0OXMKPj4+Pj4+PiB1c2VywqDCoMKg IDBtMiwwNDlzCj4+Pj4+Pj4gc3lzwqDCoMKgIDBtMCwwMjNzCj4+Pj4+Pj4KPj4+Pj4+PiBCZXN0 IHJlZ2FyZHMKPj4+Pj4+Pgo+Pj4+Pj4+IFsxXSAtIGh0dHBzOi8vZ2l0aHViLmNvbS9yYXNwYmVy cnlwaS91c2VybGFuZAo+Pj4+Pj4gUGxlYXNlIGZlZWwgZnJlZSB0byB0cnkgdGhlIHBhdGNoIHNo b3duIGJlbG93LsKgIE9yIHRoZSBwYWlyIG9mIHBhdGNoZXMKPj4+Pj4+IGZyb20gUmlrIGhlcmU6 Cj4+Pj4+Pgo+Pj4+Pj4gaHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvbGttbC8yMDIyMDIxODE4MzEx NC4yODY3NTI4LTItcmllbEBzdXJyaWVsLmNvbS8KPj4+Pj4+IGh0dHBzOi8vbG9yZS5rZXJuZWwu b3JnL2xrbWwvMjAyMjAyMTgxODMxMTQuMjg2NzUyOC0zLXJpZWxAc3VycmllbC5jb20vCj4+Pj4+ IEkgdHJpZWQgeW91ciBwYXRjaCBhbmQgUmlrJ3MgcGF0Y2hlcyBidXQgaW4gYm90aCBjYXNlcyB2 Y2hpcV90ZXN0IHJ1bnMgNwo+Pj4+PiBtaW51dGVzIGluc3RlYWQgb2YgfiAxIHNlY29uZC4KPj4+ PiBUaGF0IGlzIHN1cnByaXNpbmcuwqAgRG8geW91IGJvb3Qgd2l0aCByY3VwZGF0ZS5yY3Vfbm9y bWFsPTE/Cj4+PiBObywgbm90IGV4cGxpY2l0Lgo+Pj4+IMKgwqAgVGhhdCB3b3VsZAo+Pj4+IG51 bGxpZnkgbXkgcGF0Y2gsIGJ1dCBJIHdvdWxkIGV4cGVjdCB0aGF0IFJpaydzIHBhdGNoIHdvdWxk IHN0aWxsIHByb3ZpZGUKPj4+PiBpbmNyZWFzZWQgcGVyZm9ybWFuY2UgZXZlbiBpbiB0aGF0IGNh c2UuCj4+PiBJIHdpbGwgcmV0ZXN0IHdpdGggYSBmcmVzaCBTRCBjYXJkIGltYWdlLgo+Pj4+Cj4+ Pj4gQ291bGQgeW91IHBsZWFzZSBjaGFyYWN0ZXJpemUgd2hlcmUgdGhlIHNsb3dkb3duIGlzIG9j Y3VycmluZz8KPj4+Cj4+PiBVbmZvcnR1bmF0ZWx5IGkgZG9uJ3QgaGF2ZSBhIGRlZXAgaW5zaWdo dCBpbnRvIGRyaXZlciBhbmQgdmNoaXFfdGVzdCB0b29sLiAKPj4+IEp1c3QgYSB1c2VyIHZpZXcu Cj4+Pgo+Pj4gRG8geW91IHRoaW5rIGFuIHN0cmFjZSB3b3VsZCBiZSBhIGdvb2Qgc3RhcnRpbmcg cG9pbnQ/Cj4+Pgo+Pj4gQFBoaWwgQW55IGFkdmljZXMgdG8gYW5hbHlzZSB0aGlzIGlzc3VlPwo+ Pgo+PiBTZW5kaW5nIG1hbnkgc21hbGwgY29udHJvbCBwYWNrZXRzOgo+Pgo+PiDCoMKgIHZjaGlx X3Rlc3QgLWMgMSAxMDAwMAo+Pgo+PiBlc3NlbnRpYWxseSB0ZXN0cyBpbnRlcnJ1cHQgbGF0ZW5j eS4gVXNpbmcgYSBzbWFsbCBudW1iZXIgb2YgbGFyZ2UgYnVsayAKPj4gdHJhbnNmZXJzOgo+Pgo+ PiDCoMKgIHZjaGlxX3Rlc3QgLWIgMTAwMDAgMQo+Pgo+PiBiZWNvbWVzIGEgdGVzdCBvZiBob3cg bG9uZyBpdCB0YWtlcyB0byBsb2NrIGRvd24gcGFnZXMuIEl0IGFsc28gdGVzdHMgRE1BIAo+PiB0 cmFuc2ZlciBzcGVlZHMsIGJ1dCBzaW5jZSB0aGUgRE1BIGlzIHJ1biBieSB0aGUgZmlybXdhcmUg KHdoaWNoIHlvdSBhcmVuJ3QgCj4+IGNoYW5naW5nKSwgSSB0aGluayB5b3UgY2FuIHJ1bGUgdGhh dC4KPiBUaGFua3MgaSB3aWxsIHRyeS4KPj4KPj4gWW91IG1heSBhbHNvIGZpbmQgaXQgaGVscGZ1 bCB0byBpbmNsdWRlICJmb3JjZV90dXJibz0xIiBpbiBjb25maWcudHh0IGZvciBtb3JlIAo+PiBw cmVkaWN0YWJsZSByZXN1bHRzLgo+Pgo+PiBCeSB0aGUgd2F5LCBydW5uaW5nIG91ciA1LjE4LXJj Ny1iYXNlZCBicmFuY2ggb24gYSAzQisgSSdtIG5vdCBzZWVpbmcgYW55IAo+PiBwZXJmb3JtYW5j ZSBwcm9ibGVtczoKPiBJIGFzc3VtZSB5b3UgYXJlIHVzaW5nIGFybS9iY20yNzA5X2RlZmNvbmZp ZyBhbmQgbm90IGFybS9tdWx0aV92N19kZWZjb25maWcgYXMgbWU/CgpUaGF0J3MgY29ycmVjdC4g U2ltcGx5IHN3aXRjaGluZyB0byBtdWx0aV92N19kZWZjb25maWcgYnJlYWtzIHZjaGlxIGNvbXBs ZXRlbHksIApwcmVzdW1hYmx5IGJlY2F1c2UgaXQgZG9lc24ndCBkZWZpbmUgQ09ORklHX0JDTTI4 MzVfVkNISVEuCgpQaGlsCgo+Pgo+PiBwaUByYXNwYmVycnlwaTp+JCB0aW1lIHZjaGlxX3Rlc3Qg LWYgMQo+PiBGdW5jdGlvbmFsIHRlc3QgLSBpdGVyczoxCj4+ID09PT09PT09IGl0ZXJhdGlvbiAx ID09PT09PT09Cj4+IFRlc3RpbmcgYnVsayB0cmFuc2ZlciBmb3IgYWxpZ25tZW50Lgo+PiBUZXN0 aW5nIGJ1bGsgdHJhbnNmZXIgYXQgUEFHRV9TSVpFLgo+Pgo+PiByZWFswqDCoMKgIDBtMC41MTJz Cj4+IHVzZXLCoMKgwqAgMG0wLjA0MnMKPj4gc3lzwqDCoMKgwqAgMG0wLjE2NXMKPj4KPj4gUGhp bAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgt YXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQu b3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJt LWtlcm5lbAo=