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[209.85.218.43]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-645363b66e5sm2926102a12.14.2025.11.20.13.56.07 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 20 Nov 2025 13:56:10 -0800 (PST) Received: by mail-ej1-f43.google.com with SMTP id a640c23a62f3a-b7370698a8eso175336666b.0 for ; Thu, 20 Nov 2025 13:56:07 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCW6Kte1yA2tgZDl3OE6q5fI5v+JAH+JsFfj9OmT9m4n+CCH6CiEfo7hn1vlfzPniM5zMsrLiUFY4Q==@kvack.org X-Received: by 2002:a17:907:1ca0:b0:b73:5d8c:dd0d with SMTP id a640c23a62f3a-b766ac23851mr104828766b.52.1763675767229; Thu, 20 Nov 2025 13:56:07 -0800 (PST) MIME-Version: 1.0 References: <3f4ec3be-0725-43cc-a75b-72549ebdc5c9@suse.cz> In-Reply-To: From: Linus Torvalds Date: Thu, 20 Nov 2025 13:55:51 -0800 X-Gmail-Original-Message-ID: X-Gm-Features: AWmQ_blIe3yHIH7SnjIHXN8QnxviVtxqrjH_9LSAHZCwSd4hWkssl3snusfn1vU Message-ID: Subject: Re: [GIT PULL] slab fix for 6.18-rc7 To: Matthew Wilcox Cc: Vlastimil Babka , Andrew Morton , Harry Yoo , David Rientjes , Christoph Lameter , Roman Gushchin , "linux-mm@kvack.org" , LKML , Christoph Hellwig Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 1F400C0005 X-Stat-Signature: a9eakiifkendt74qt3kf4eeif3kmhekg X-Rspam-User: X-HE-Tag: 1763675772-221678 X-HE-Meta: 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 SFbLs7ul 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 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: List-Subscribe: List-Unsubscribe: On Thu, 20 Nov 2025 at 13:37, Linus Torvalds wrote: > > HIGHMEM was a mistake forced on us by bad hardware. We should revel in > the fact that it is not really relevant any more. Btw. there are probably many other cases where we might just say "this makes no sense in HIGHMEM". But most of the time, it's not worth actively removing support for it - it's just more work. But when there's a case like this mempool debug thing, just say "we don't care about this debug feature for HIGHMEM" rather than trying to actually deal with it. IOW, just don't write extra code for it. Linus