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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1722374124; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=JF9WcIZIviOi8WrpLmtOh2Lzs2aF2Vl/O26GQ64Y/98=; b=RSr+cjDWuXgafRzyqIBv5new6nuccIsEjcvQDRviVqGQIT6yRlgYbYedLFXOPyD0LCjzkF qxsB+HnKCBCYeBuhLRSnvZVMHx84D1m5be2xKguy2VFdEy5sVRtN6Z4LBz302mWZZGoV3o jtqpb670TYwP7aAY1ouwmJxVwT6xDVE= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 0238C61FAD; Tue, 30 Jul 2024 21:15:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6B793C32782; Tue, 30 Jul 2024 21:15:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1722374127; bh=JF9WcIZIviOi8WrpLmtOh2Lzs2aF2Vl/O26GQ64Y/98=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=IFclImUcY1ntyPlWx/JCWFOXcS1a9B1alIoc99VjJZJ0cItOpYMzfNtGOk6l3sWYo 2S3J1nRdiOd2+fSMaaUCHbyHronK66FPTueaR+3kcMvFMIR8roK8BFl9PiurMMLLIy JacVDEwp0Ruo5TCOm8CAX19LjPmXBxYAI1Bn7Pk8= Date: Tue, 30 Jul 2024 14:15:26 -0700 From: Andrew Morton To: Danilo Krummrich Cc: urezki@gmail.com, hch@infradead.org, vbabka@suse.cz, mhocko@suse.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 2/4] mm: vrealloc: consider spare memory for __GFP_ZERO Message-Id: <20240730141526.ef8f665b3ccc65d3b41eed22@linux-foundation.org> In-Reply-To: <20240730185049.6244-3-dakr@kernel.org> References: <20240730185049.6244-1-dakr@kernel.org> <20240730185049.6244-3-dakr@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: E81A540007 X-Rspamd-Server: rspam01 X-Stat-Signature: wqn4xjicmjs3tt797an6gri4hoemt7sz X-HE-Tag: 1722374128-968179 X-HE-Meta: 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 KRfP9iCS ILrLi/aZEV29acAMiFCXN0XbXcIJ0QbhMsUoWxjta/QC/9nA+ln2+ZO4lbvdxJGO4g6R+/BCTmzfaEarXArSP5xJ/iGN35qin56lVdk+9l1MUAl7nIthimgXpCrnWRGQ5V2SRLR+lQCSIOGQcEE4qnaAYQ4wnkRhkaVm5eF0HBYoZLQD59yn/nM8jr2PZIJZ5xdV3V0N9My5clpKSCqMhd1ava6BBIc9y4PE9lwYHJuPhWA2Qg25ll4kAZpynd1Q8cLn9iFKTIi+5ZJ2O75Dtgi2BnS8k+yIGMGf9TnKBiPw2dLiY/QFCyMyFr2NiCZ3fKlOfHZ+AOubqBHMZOzZd50bgkU/meFDEVpz/Ky9Y6tKHjQk= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000145, 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 Tue, 30 Jul 2024 20:49:42 +0200 Danilo Krummrich wrote: > Zero spare memory when shrinking a buffer with __GFP_ZERO. Again, why?