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[24.6.216.183]) by smtp.gmail.com with ESMTPSA id p7sm12625366pfn.52.2021.01.30.17.19.37 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 30 Jan 2021 17:19:38 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\)) Subject: Re: [RFC 01/20] mm/tlb: fix fullmm semantics From: Nadav Amit In-Reply-To: Date: Sat, 30 Jan 2021 17:19:36 -0800 Cc: Linux-MM , LKML , Andrea Arcangeli , Andrew Morton , Dave Hansen , Peter Zijlstra , Thomas Gleixner , Will Deacon , Yu Zhao , Nick Piggin , X86 ML Content-Transfer-Encoding: 7bit Message-Id: References: <20210131001132.3368247-1-namit@vmware.com> <20210131001132.3368247-2-namit@vmware.com> To: Andy Lutomirski X-Mailer: Apple Mail (2.3608.120.23.2.4) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > On Jan 30, 2021, at 5:02 PM, Andy Lutomirski wrote: > > On Sat, Jan 30, 2021 at 4:16 PM Nadav Amit wrote: >> From: Nadav Amit >> >> fullmm in mmu_gather is supposed to indicate that the mm is torn-down >> (e.g., on process exit) and can therefore allow certain optimizations. >> However, tlb_finish_mmu() sets fullmm, when in fact it want to say that >> the TLB should be fully flushed. > > Maybe also rename fullmm? Possible. How about mm_torn_down? I should have also changed the comment in tlb_finish_mmu().