From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 291E0C021B2 for ; Thu, 20 Feb 2025 23:23:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B5DAE6B00C2; Thu, 20 Feb 2025 18:23:41 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id AE6A96B00C3; Thu, 20 Feb 2025 18:23:41 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 986F36B00C4; Thu, 20 Feb 2025 18:23:41 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 7807E6B00C2 for ; Thu, 20 Feb 2025 18:23:41 -0500 (EST) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 2CC551632EE for ; 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imf23.hostedemail.com; dkim=none; spf=pass (imf23.hostedemail.com: domain of byungchul@sk.com designates 166.125.252.92 as permitted sender) smtp.mailfrom=byungchul@sk.com; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1740093819; a=rsa-sha256; cv=none; b=0E/QG52aweC28ORykK+rGK/FjNldZOXTvuvfOUmwEY1RzsbJctC2zotcgZl0yXF5R7qOeK nOpUHEA+lq8th4rAq29hBm5RV/h6Be9xi7SMVK0afQx5SlQFQ4NAu9JLkw4W27Vm58jOFQ zI38s8AsLOKZjd0DJHN4MjwZjreyBQQ= X-AuditID: a67dfc5b-3e1ff7000001d7ae-17-67b7b976c54b Date: Fri, 21 Feb 2025 08:23:29 +0900 From: Byungchul Park To: Dave Hansen Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel_team@skhynix.com, akpm@linux-foundation.org, ying.huang@intel.com, vernhao@tencent.com, mgorman@techsingularity.net, hughd@google.com, willy@infradead.org, david@redhat.com, peterz@infradead.org, luto@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, rjgolo@gmail.com Subject: Re: [RFC PATCH v12 00/26] LUF(Lazy Unmap Flush) reducing tlb numbers over 90% Message-ID: <20250220232329.GA39373@system.software.com> References: <20250220052027.58847-1-byungchul@sk.com> <8accbd91-ca59-43f8-b190-7e1ac3df5e11@intel.com> MIME-Version: 1.0 Content-Type: text/plain; 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However, I tagged RFC again because there are > > still issues that should be resolved to merge to mainline: > > I don't see anything fundamentally different here from the last 11 > versions. I think the entire approach is dangerous and basically makes > things impossible to debug. It's not clear that some of the failure > scenarios that I've brought up in the past have actually been fixed. Respect your opinion. > What I've said here still stands: > > > https://lore.kernel.org/all/fab1dd64-c652-4160-93b4-7b483a8874da@intel.com/ > > > I think tglx would call all of this "tinkering". The approach to this > > series is to "fix" narrow, specific cases that reviewers point out, make > > it compile, then send it out again, hoping someone will apply it. > > > > So, for me, until the approach to this series changes: NAK, for x86. > > Andrew, please don't take this series. Or, if you do, please drop the > > patch enabling it on x86. > > I think I'd also like to stop being cc'd on this. If LUF is merged into I will un-cc you from the next spin. Byungchul > mainline and proven to work on arm64 or riscv for a year, I'd be happy > to take another look at enabling it on x86. I think that's just about > the only thing that would make me reconsider.