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[209.85.218.43]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9a912d63a6sm127548866b.22.2024.10.20.14.22.07 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 20 Oct 2024 14:22:08 -0700 (PDT) Received: by mail-ej1-f43.google.com with SMTP id a640c23a62f3a-a9a0472306cso508367666b.3 for ; Sun, 20 Oct 2024 14:22:07 -0700 (PDT) X-Forwarded-Encrypted: i=1; AJvYcCU8jmSPUvHmNcpw1dPuhamFZAF9BZeOdZ/OZ7g+6phmq7w8RAH7V6BpUKZf5H/litXeHA3DpotJEw==@kvack.org X-Received: by 2002:a17:907:930b:b0:a9a:d2a:be39 with SMTP id a640c23a62f3a-a9a69a760ecmr1013593466b.25.1729459327586; Sun, 20 Oct 2024 14:22:07 -0700 (PDT) MIME-Version: 1.0 References: <90bc0794-4cab-415f-a442-4af85a32eed8@lucifer.local> <6eo3gekf6twbnzhpsi2emz2s6sgtof6iba2rvbor7himmejoq5@qbfwtpbpvqoe> In-Reply-To: From: Linus Torvalds Date: Sun, 20 Oct 2024 14:21:50 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] mm: Drop INT_MAX limit from kvmalloc() To: Kent Overstreet Cc: Lorenzo Stoakes , linux-bcachefs@vger.kernel.org, linux-mm@kvack.org, Vlastimil Babka , Andrew Morton , Uladzislau Rezki , Christoph Hellwig Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: BFF2A1C0012 X-Stat-Signature: mt7f7as4xurmehrq6y8k841o5qa43zg1 X-HE-Tag: 1729459325-661220 X-HE-Meta: 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 GvLMxzhB 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000943, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sun, 20 Oct 2024 at 13:54, Linus Torvalds wrote: > > On Sun, 20 Oct 2024 at 13:30, Kent Overstreet wrote: > > > > Latency for journal replay? > > No, latency for the journaling itself. Side note: latency of the journal replay can actually be quite critical indeed for any "five nines" operation, and big journals are not necessarily a good idea for that reason. There's a very real reason many places don't use filesystems that do fsck any more. But yes, it's a different issue from the runtime performance / latency side. Linus