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Fri, 18 Sep 2026 03:53:45 -0700 (PDT) Received: from [10.125.112.20] ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ddb7525b2asm5835555ad.19.2026.09.18.03.53.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 18 Sep 2026 03:53:44 -0700 (PDT) Message-ID: <1a47d5de-fb68-4c10-a199-f0d274689cdc@gmail.com> Date: Fri, 18 Sep 2026 18:53:32 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 00/10] kdump: reduce vmcore size and capture time To: Baoquan He Cc: catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, robh@kernel.org, saravanak@kernel.org, akpm@linux-foundation.org, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, m.szyprowski@samsung.com, mark.rutland@arm.com, kernel@xen0n.name, alex@ghiti.fr, hpa@zytor.com, ruirui.yang@linux.dev, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org, iommu@lists.linux.dev References: <20260902073116.802752-1-chenwandun1@gmail.com> Content-Language: en-US From: Wandun In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260918_035346_296122_397EDD32 X-CRM114-Status: GOOD ( 12.09 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpPbiA5LzE4LzI2IDE2OjE3LCBCYW9xdWFuIEhlIHdyb3RlOgo+IE9uIDA5LzAyLzI2IGF0IDAz OjMxcG0sIFdhbmR1biBDaGVuIHdyb3RlOgo+PiBGcm9tOiBXYW5kdW4gQ2hlbiA8Y2hlbndhbmR1 bkBsaXhpYW5nLmNvbT4KPj4KPiAuLi5zbmlwLi4uIAo+PiBBQ1BJIHN5c3RlbXMgYWxyZWFkeSBm aWx0ZXIgcmVzZXJ2ZWQgbWVtb3J5IG91dCBvZiB0aGUgdm1jb3JlIHRocm91Z2gKPj4gdGhlaXIg ZXhpc3RpbmcgcGF0aDsgb25seSBEVC1iYXNlZCBzeXN0ZW1zIGN1cnJlbnRseSBmYWlsIHRvIGZp bHRlciB0aGVzZQo+PiByZWdpb25zLCB3aGljaCBpcyB3aGF0IHRoaXMgc2VyaWVzIGFkZHJlc3Nl cy4gVGhlIGZsYWcgbGl2ZXMgaW4gbWVtYmxvY2sKPj4gaXRzZWxmIHJhdGhlciB0aGFuIGluIGEg RFQtb25seSBzdHJ1Y3R1cmUsIHNvIHRoZSBtZWNoYW5pc20gaXMgZ2VuZXJpYyBhbmQKPiAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgIH5+fgo+IFRoZSBwYXRjaHNldCBpdHNlbGYgbG9va3MgZ29vdCB0byBtZSwgd2hpbGUgSSBh bSBjb25jZXJuZWQgaWYgaXQncwo+IHJlYWxseSBnZW5lcmljLiBJIHJhaXNlZCB0aGF0IGluIHN1 Yi10aHJlYWQgdGFsa2luZyB3aXRoIFdhbmR1bi4gSW1hZ2luZQo+IEkgdHJpZWQgdG8gZXhjbHVk ZSBtYW55IGRyaXZlciByZWdpb25zIGFuZCBzcGxpdCBtZW1ibG9jayByZWdpb25zIGludG8KPiBo dW5kcmVkcywgY21hIGNvdWxkIHllbGwgb3V0OiBjbWFfZGVjbGFyZV9jb250aWd1b3VzX211bHRp KCk/CgpBcmUgeW91IGNvbmNlcm5lZCB0aGF0IHNldHRpbmcgdGhlIE1FTUJMT0NLX05PRFVNUCBm bGFnIGNvdWxkIHNwbGl0IGEgbWVtYmxvY2sKcmVnaW9uIGludG8gbWFueSBzbWFsbGVyIHJlZ2lv bnMsIHdoaWNoIG1pZ2h0IHRoZW4gcHJldmVudApjbWFfZGVjbGFyZV9jb250aWd1b3VzX211bHRp KCkgZnJvbSBzYXRpc2Z5aW5nIGEgbXVsdGktcmFuZ2UgYWxsb2NhdGlvbj8KSWYgc28sIElJQ1Ug SSBkb27igJl0IHRoaW5rIHRoYXQgYXBwbGllcyBoZXJlLgoKTUVNQkxPQ0tfTk9EVU1QIGlzIGN1 cnJlbnRseSBvbmx5IHNldCBvbiBtZW1vcnkgdGhhdCBoYXMgYWxyZWFkeSBiZWVuIHJlc2VydmVk LgpUaGVzZSByZWdpb25zIGFyZSBleGNsdWRlZCB3aGVuIGl0ZXJhdGluZyBvdmVyIGZyZWUgbWVt b3J5LCBzbyBtYXJraW5nIHRoZW0gTk9EVU1QCmRvZXMgbm90IGluY3JlYXNlIHRoZSBudW1iZXIg b2YgZnJlZSByZWdpb25zIHNlZW4gYnkgQ01BLgoKCkJlZm9yZSBtYXJraW5nIE5PRFVNUDoKCiAg bWVtYmxvY2subWVtb3J5OiAgICBbIGZyZWUgXSBbIHJlc2VydmVkIF0gWyBmcmVlIF0KICBtZW1i bG9jay5yZXNlcnZlZDogICAgICAgICAgIFsgcmVzZXJ2ZWQgXQoKTm93LCBmb3IgbWVtYmxvY2su bWVtb3J5LCBpdCBpcyBvbmUgcmVnaW9uIHRoYXQgY29udGFpbnMgZnJlZSBhbmQgcmVzZXJ2ZWQg bWVtb3J5LgoKCkFmdGVyIG1hcmtpbmcgdGhlIHJlc2VydmVkIHJlZ2lvbiBOT0RVTVA6CgogIG1l bWJsb2NrLm1lbW9yeTogICAgWyBmcmVlIF0gWyAgTk9EVU1QICBdIFsgZnJlZSBdCiAgbWVtYmxv Y2sucmVzZXJ2ZWQ6ICAgICAgICAgICBbIHJlc2VydmVkIF0KCmZvciBtZW1ibG9jay5tZW1vcnks IGl0IHNwbGl0cyBpbnRvIDMgcmVnaW9ucywgMiBmcmVlIHJlZ2lvbnMsIDEgbm9kdW1wIHJlZ2lv bi4KCkFsdGhvdWdoIHRoZSBtZW1ibG9jay5tZW1vcnkgYXJyYXkgbWF5IGJlIHNwbGl0IGludGVy bmFsbHksIGl0IGRvZXMgbm90IGNyZWF0ZSBhZGRpdGlvbmFsCmZyZWUgcmFuZ2VzIGZvciBjbWFf ZGVjbGFyZV9jb250aWd1b3VzX211bHRpKCkgdG8gcHJvY2Vzcy4KCgo+IAo+IElNSE8sIHdpdGhk cmF3aW5nIHRoZSBjbGFpbSBjYW4gZml4IHRoZSBuaXQgY29uY2Vybi4gSWYgSSBhbSB3cm9uZywK PiBwbGVhc2UgaGVscCBwb2ludCBpdCBvdXQgdG8gbGV0IG1lIGxlYXJuIG1vcmUuCgpJIHdpbGwg cmV2aXNlIHRoaXMgZGVzY3JpcHRpb24gdG8gYXZvaWQgYW55IG1pc3VuZGVyc3RhbmRpbmcuCgpC ZXN0IHJlZ2FyZHMsCldhbmR1bgoKCj4gCj4gVGhhbmtzCj4gQmFvcXVhbgo+IAo+PiBib3RoIEFD UEkgYW5kIERUIHN5c3RlbXMgY2FuIGJlbmVmaXQgZnJvbSBpdCAoc3VnZ2VzdGVkIGJ5IFJvYiwg dGhhbmtzKSBbMV0uCj4+Cj4+IFNpbmNlIHRoZSByZXNlcnZlZCBtZW1vcnkgcmVnaW9ucyBhcmUg ZmlsdGVyZWQgb3V0LCB0aGUgdm1jb3JlIGlzCj4+IHNtYWxsZXIgaW4gc2l6ZSBhbmQgZmFzdGVy IHRvIHByb2R1Y2UuIAo+Pgo+IC4uLnNuaXAuLi4KCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QKbGludXgtcmlz Y3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==