From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 943151DF258 for ; Wed, 25 Feb 2026 02:51:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771987922; cv=none; b=FUfpmqzk9KL74/sIad9LUOUJW2Py2frpJlaJjORLxAS7OCr9vdI7fG6fkC8MPFjlBlxKyhvPdSU8tqeUPi68zH05DNN1LpYbhQOwmJu9OjAna7jQL+axk8GnyHn1zTBQ/LSTQkQ+dWTfcT51ioBY3lUkRXIpvw0nRwmU1Pob+wA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771987922; c=relaxed/simple; bh=BUewdg1wHSATjTW4it3R1EI6h1poyfTzxmODGl1Y9qY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:Content-Type: MIME-Version:Message-ID; b=T+Fxzz5d9wmzafVBTZ9ivoeIqCVlox/qctT4jx/UkBTKI/Mb9gyWGw8sjHlskBfCP/R9QCxrfahjsic0NBC2WXLyUPjSLSyyWvmGZlJtz+erdNPwDFvxYaJo0NGhZDPDif1eApMvVG2Iw/cJel1gPUK3dGQytR7PD/bPfdmUiYs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=JUw2en5t; arc=none smtp.client-ip=117.135.210.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="JUw2en5t" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:To:Subject:Content-Type:MIME-Version: Message-ID; bh=BUewdg1wHSATjTW4it3R1EI6h1poyfTzxmODGl1Y9qY=; b=J Uw2en5tSP5Hu/X/6Xo7A9xfDyMVFTCLINltKVc999KToM/fWHXJLy8+IOKfqC4A2 TQohwqXYxUv53T18e2jIjqF1ETeRvpsHEMbLZ/lslY/dwaawXAuV2wFcvKzh9q/2 qYU36yFoqyXAAgTPDb3tnTRZgNqzslyV/AHofUdJvg= Received: from 00107082$163.com ( [111.35.188.114] ) by ajax-webmail-wmsvr-40-123 (Coremail) ; Wed, 25 Feb 2026 10:50:35 +0800 (CST) Date: Wed, 25 Feb 2026 10:50:35 +0800 (CST) From: "David Wang" <00107082@163.com> To: "Suren Baghdasaryan" Cc: akpm@linux-foundation.org, vbabka@suse.cz, harry.yoo@oracle.com, cl@gentwo.org, rientjes@google.com, roman.gushchin@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re:[PATCH v2 1/1] mm/slab: mark alloc tags empty for sheafs allocated with __GFP_NO_OBJ_EXT X-Priority: 3 X-Mailer: Coremail Webmail Server Version 2023.4-cmXT build 20251222(83accb85) Copyright (c) 2002-2026 www.mailtech.cn 163com In-Reply-To: <20260224221132.1702713-1-surenb@google.com> References: <20260224221132.1702713-1-surenb@google.com> X-NTES-SC: AL_Qu2cA/WTuEAo4yKfZekXn0oTju85XMCzuv8j3YJeN500kSTS6iQcWlhvL3rp8P6UOjGQjBiQaRN/++VfUaJUT45D48UdzwFr+v1WFNUcgSCf 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: <6bebf90c.1ff0.19c92b4998d.Coremail.00107082@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:eygvCgDnj5x8Y55p1+lsAA--.7023W X-CM-SenderInfo: qqqrilqqysqiywtou0bp/xtbC7hz5pGmeY3wUfQAA3u X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== QXQgMjAyNi0wMi0yNSAwNjoxMTozMiwgIlN1cmVuIEJhZ2hkYXNhcnlhbiIgPHN1cmVuYkBnb29n bGUuY29tPiB3cm90ZToKPmFsbG9jX2VtcHR5X3NoZWFmKCkgYWxsb2NhdGVzIHNoZWFmcyBmcm9t IFNMQUJfS01BTExPQyBjYWNoZXMgdXNpbmcKPl9fR0ZQX05PX09CSl9FWFQgdG8gYXZvaWQgcmVj dXJzaW9uLCBob3dldmVyIGl0IGRvZXMgbm90IG1hcmsgdGhlaXIKPmFsbG9jYXRpb24gdGFncyBl bXB0eSBiZWZvcmUgZnJlZWluZywgd2hpY2ggcmVzdWx0cyBpbiBhIHdhcm5pbmcgd2hlbgo+Q09O RklHX01FTV9BTExPQ19QUk9GSUxJTkdfREVCVUcgaXMgc2V0LiBGaXggdGhpcyBieSBtYXJraW5n IGFsbG9jYXRpb24KPnRhZ3MgZm9yIHN1Y2ggYWxsb2NhdGlvbnMgYXMgZW1wdHkuCj4KPlJlcG9y dGVkLWJ5OiBEYXZpZCBXYW5nIDwwMDEwNzA4MkAxNjMuY29tPgo+Q2xvc2VzOiBodHRwczovL2xv cmUua2VybmVsLm9yZy9hbGwvMjAyNjAyMjMxNTUxMjguMzg0OS0xLTAwMTA3MDgyQDE2My5jb20v Cj5BbmFseXplZC1ieTogSGFycnkgWW9vIDxoYXJyeS55b29Ab3JhY2xlLmNvbT4KPlNpZ25lZC1v ZmYtYnk6IFN1cmVuIEJhZ2hkYXNhcnlhbiA8c3VyZW5iQGdvb2dsZS5jb20+Cj4tLS0KPiBtbS9z bGFiLmggfCAgNCArKy0tCj4gbW0vc2x1Yi5jIHwgMjMgKysrKysrKysrKysrKysrLS0tLS0tLS0K PiAyIGZpbGVzIGNoYW5nZWQsIDE3IGluc2VydGlvbnMoKyksIDEwIGRlbGV0aW9ucygtKQo+Cj5k aWZmIC0tZ2l0IGEvbW0vc2xhYi5oIGIvbW0vc2xhYi5oCj5pbmRleCA3MWM3MjYxYmY4MjIuLmY2 ZWY4NjJiNjBlZiAxMDA2NDQKPi0tLSBhL21tL3NsYWIuaAo+KysrIGIvbW0vc2xhYi5oCj5AQCAt MjkwLDE0ICsyOTAsMTQgQEAgc3RhdGljIGlubGluZSB2b2lkICpuZWFyZXN0X29iaihzdHJ1Y3Qg a21lbV9jYWNoZSAqY2FjaGUsCj4gCj4gLyogRGV0ZXJtaW5lIG9iamVjdCBpbmRleCBmcm9tIGEg Z2l2ZW4gcG9zaXRpb24gKi8KPiBzdGF0aWMgaW5saW5lIHVuc2lnbmVkIGludCBfX29ial90b19p bmRleChjb25zdCBzdHJ1Y3Qga21lbV9jYWNoZSAqY2FjaGUsCj4tCQkJCQkgIHZvaWQgKmFkZHIs IHZvaWQgKm9iaikKPisJCQkJCSAgdm9pZCAqYWRkciwgY29uc3Qgdm9pZCAqb2JqKQo+IHsKPiAJ cmV0dXJuIHJlY2lwcm9jYWxfZGl2aWRlKGthc2FuX3Jlc2V0X3RhZyhvYmopIC0gYWRkciwKPiAJ CQkJIGNhY2hlLT5yZWNpcHJvY2FsX3NpemUpOwo+IH0KPiAKPiBzdGF0aWMgaW5saW5lIHVuc2ln bmVkIGludCBvYmpfdG9faW5kZXgoY29uc3Qgc3RydWN0IGttZW1fY2FjaGUgKmNhY2hlLAo+LQkJ CQkJY29uc3Qgc3RydWN0IHNsYWIgKnNsYWIsIHZvaWQgKm9iaikKPisJCQkJCWNvbnN0IHN0cnVj dCBzbGFiICpzbGFiLCBjb25zdCB2b2lkICpvYmopCj4gewo+IAlpZiAoaXNfa2ZlbmNlX2FkZHJl c3Mob2JqKSkKPiAJCXJldHVybiAwOwo+ZGlmZiAtLWdpdCBhL21tL3NsdWIuYyBiL21tL3NsdWIu Ywo+aW5kZXggODYyNjQyYzE2NWVkLi41Yzc2ZTU1ZWVlN2QgMTAwNjQ0Cj4tLS0gYS9tbS9zbHVi LmMKPisrKyBiL21tL3NsdWIuYwo+QEAgLTIwNDEsMTggKzIwNDEsMTggQEAgc3RhdGljIGlubGlu ZSB2b2lkIGRlY19zbGFic19ub2RlKHN0cnVjdCBrbWVtX2NhY2hlICpzLCBpbnQgbm9kZSwKPiAK PiAjaWZkZWYgQ09ORklHX01FTV9BTExPQ19QUk9GSUxJTkdfREVCVUcKPiAKPi1zdGF0aWMgaW5s aW5lIHZvaWQgbWFya19vYmpleHRzX2VtcHR5KHN0cnVjdCBzbGFib2JqX2V4dCAqb2JqX2V4dHMp Cj4rc3RhdGljIGlubGluZSB2b2lkIG1hcmtfb2JqZXh0c19lbXB0eShjb25zdCB2b2lkICpvYmop Cj4gewo+LQlzdHJ1Y3Qgc2xhYiAqb2JqX2V4dHNfc2xhYjsKPisJc3RydWN0IHNsYWIgKm9ial9z bGFiOwo+IAl1bnNpZ25lZCBsb25nIHNsYWJfZXh0czsKPiAKPi0Jb2JqX2V4dHNfc2xhYiA9IHZp cnRfdG9fc2xhYihvYmpfZXh0cyk7Cj4tCXNsYWJfZXh0cyA9IHNsYWJfb2JqX2V4dHMob2JqX2V4 dHNfc2xhYik7Cj4rCW9ial9zbGFiID0gdmlydF90b19zbGFiKG9iaik7Cj4rCXNsYWJfZXh0cyA9 IHNsYWJfb2JqX2V4dHMob2JqX3NsYWIpOwo+IAlpZiAoc2xhYl9leHRzKSB7Cj4gCQlnZXRfc2xh Yl9vYmpfZXh0cyhzbGFiX2V4dHMpOwo+LQkJdW5zaWduZWQgaW50IG9mZnMgPSBvYmpfdG9faW5k ZXgob2JqX2V4dHNfc2xhYi0+c2xhYl9jYWNoZSwKPi0JCQkJCQkgb2JqX2V4dHNfc2xhYiwgb2Jq X2V4dHMpOwo+LQkJc3RydWN0IHNsYWJvYmpfZXh0ICpleHQgPSBzbGFiX29ial9leHQob2JqX2V4 dHNfc2xhYiwKPisJCXVuc2lnbmVkIGludCBvZmZzID0gb2JqX3RvX2luZGV4KG9ial9zbGFiLT5z bGFiX2NhY2hlLAo+KwkJCQkJCSBvYmpfc2xhYiwgb2JqKTsKPisJCXN0cnVjdCBzbGFib2JqX2V4 dCAqZXh0ID0gc2xhYl9vYmpfZXh0KG9ial9zbGFiLAo+IAkJCQkJCSAgICAgICBzbGFiX2V4dHMs IG9mZnMpOwo+IAo+IAkJaWYgKHVubGlrZWx5KGlzX2NvZGV0YWdfZW1wdHkoJmV4dC0+cmVmKSkp IHsKPkBAIC0yMDkwLDcgKzIwOTAsNyBAQCBzdGF0aWMgaW5saW5lIHZvaWQgaGFuZGxlX2ZhaWxl ZF9vYmpleHRzX2FsbG9jKHVuc2lnbmVkIGxvbmcgb2JqX2V4dHMsCj4gCj4gI2Vsc2UgLyogQ09O RklHX01FTV9BTExPQ19QUk9GSUxJTkdfREVCVUcgKi8KPiAKPi1zdGF0aWMgaW5saW5lIHZvaWQg bWFya19vYmpleHRzX2VtcHR5KHN0cnVjdCBzbGFib2JqX2V4dCAqb2JqX2V4dHMpIHt9Cj4rc3Rh dGljIGlubGluZSB2b2lkIG1hcmtfb2JqZXh0c19lbXB0eShjb25zdCB2b2lkICpvYmopIHt9Cj4g c3RhdGljIGlubGluZSBib29sIG1hcmtfZmFpbGVkX29iamV4dHNfYWxsb2Moc3RydWN0IHNsYWIg KnNsYWIpIHsgcmV0dXJuIGZhbHNlOyB9Cj4gc3RhdGljIGlubGluZSB2b2lkIGhhbmRsZV9mYWls ZWRfb2JqZXh0c19hbGxvYyh1bnNpZ25lZCBsb25nIG9ial9leHRzLAo+IAkJCXN0cnVjdCBzbGFi b2JqX2V4dCAqdmVjLCB1bnNpZ25lZCBpbnQgb2JqZWN0cykge30KPkBAIC0yMzEyLDYgKzIzMTIs MTAgQEAgc3RhdGljIHZvaWQgYWxsb2Nfc2xhYl9vYmpfZXh0c19lYXJseShzdHJ1Y3Qga21lbV9j YWNoZSAqcywgc3RydWN0IHNsYWIgKnNsYWIpCj4gCj4gI2Vsc2UgLyogQ09ORklHX1NMQUJfT0JK X0VYVCAqLwo+IAo+K3N0YXRpYyBpbmxpbmUgdm9pZCBtYXJrX29iamV4dHNfZW1wdHkoY29uc3Qg dm9pZCAqb2JqKQo+K3sKPit9Cj4rCj4gc3RhdGljIGlubGluZSB2b2lkIGluaXRfc2xhYl9vYmpf ZXh0cyhzdHJ1Y3Qgc2xhYiAqc2xhYikKPiB7Cj4gfQo+QEAgLTI3ODMsNiArMjc4Nyw5IEBAIHN0 YXRpYyBpbmxpbmUgc3RydWN0IHNsYWJfc2hlYWYgKmFsbG9jX2VtcHR5X3NoZWFmKHN0cnVjdCBr bWVtX2NhY2hlICpzLAo+IAo+IHN0YXRpYyB2b2lkIGZyZWVfZW1wdHlfc2hlYWYoc3RydWN0IGtt ZW1fY2FjaGUgKnMsIHN0cnVjdCBzbGFiX3NoZWFmICpzaGVhZikKPiB7Cj4rCWlmIChzLT5mbGFn cyAmIFNMQUJfS01BTExPQykKPisJCW1hcmtfb2JqZXh0c19lbXB0eShzaGVhZik7Cj4rCj4gCWtm cmVlKHNoZWFmKTsKPiAKPiAJc3RhdChzLCBTSEVBRl9GUkVFKTsKPgo+YmFzZS1jb21taXQ6IDdk ZmY5OWIzNTQ2MDFkZDAxODI5ZTE1MTE3MTE4NDZlMDQzNDBhNjkKPi0tIAo+Mi41My4wLjQxNC5n ZjdlOWY2YzIwNS1nb29nCgpUZXN0ZWQtYnk6IERhdmlkIFdhbmcgPDAwMTA3MDgyQDE2My5jb20+ CgoKRGF2aWQK