From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 776D13E123D for ; Tue, 17 Mar 2026 14:16:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773757018; cv=none; b=YEQTSXO12XKS1vU0ImOSJIpH9wG1rZNKqNe/twD+EB/TUcJ0rH/L39B8DMClCpl3g0q6AhvnLLzSJa5my5CkDt3E32Oboz0wdOqrsfsCUtQzrxFTjieZD0g8CoQpt9FK3I22LpoAsGeJW8AXbYcgb2tSdCzjpkuugv6fcLVrM7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773757018; c=relaxed/simple; bh=pf3KUbRbKK0VzfBwVeZhTawMjccFLwNym6+LtLVXBrY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=alcdFd9P93RDPm6aKxpGV3zA/NNTZ4FkvdeM+Hxz5Cl1oSKfsVPEkG7Q90ZSDbYldKxQPBWNZTNefOBbePB3fjsMRY7ier5UGRCULeCdn5EahpXMuzfMWYpK5rPyGhOGq8W6bAQm7hQyUjqamCHq2eW+ZOMI7E39ZGOMJnl40/8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=CiWHsS9t; arc=none smtp.client-ip=209.85.128.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="CiWHsS9t" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-4853553944fso8112755e9.0 for ; Tue, 17 Mar 2026 07:16:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1773757016; x=1774361816; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=sHyQW1j38add3gC7b1p33IpvUlEz/eLArJFX9nPP2uU=; b=CiWHsS9tnD+wU/YD0dq+X/mD2M8UfMy2HIqfgl4WH45KzuTNYgp+0fudnwj+KVLdg7 h86XDPUEu/ONGccMVL55XeWbVcoic2y+Dc2fDaqCbXqeFnQFfId2fPJUtfZfHdR84eWQ Jo+m6jHTTjrOn4nES0LP4EE7AUD6iZWdF2fQGNz08SbYXdOLhbIr4RxzG79rbnA4KYr5 QIvyug5tLW1+duLkwLgNGOq4/IllQH15kkJG3XT/ZSc+cHREc3Q0i2S5BTRMI44fuw5s faETtpKYDQfT1ey1ZimZcEwDbOZUJuqwdr0RFg4aiIhwX2VJ1lxrUL7LiB+u9Ztb1/iI PQEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773757016; x=1774361816; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=sHyQW1j38add3gC7b1p33IpvUlEz/eLArJFX9nPP2uU=; b=NPabdhsMYijMSLIYZgARtDj7DHHeFJA30wUUoWX6RQBBP5csxF31P/4rTSIt7VeIH4 F+YC3slksIO5PmHG2BYTkQk/RfmoiiPsEavRaGyoVTd1tp64x5XfUrxNE2qqtI3QeC6O mT6Yh8fH6lGxNM3DM/AhvZgZwjBIJL4u7xXQ0CKWUuWNf9z43qTjqfWEcd73kTRaoetZ EXyG9sunwIz1D9gElyLD32ovmCCczTmJCPBN6dGLpZYA3mD1NIBG4VFeJ+CMiry441w3 prqRLYasL/DQIy6h8G45LQagpRTuKiTuboamcTtY8Q0/xC7mZ5bqE/EQZaWJQ4zAebVY 6/nA== X-Forwarded-Encrypted: i=1; AJvYcCVmAbN9iIrzqTppyE/oA7kNy3mqCoj6L3HRUj4CDYsUHVPtT1fV8gFpMhyjUAx9Cg9Cj9ZMgLg2C8fYmNQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yx1q1AOkXEx5YdVIS9WAy21nQERiLKB9Av9xx6llnonysOnP27X IwT4c6klbOmlCxhL6JqFnv1DtNatgiUVPRo0RkreJrDsEbvsabAd92DsIAcFqPSnjRNNmpRE1+r gvjjhXdHjnjBAo5q1tw== X-Received: from wmz7.prod.google.com ([2002:a05:600c:6b67:b0:485:3aa2:da59]) (user=aliceryhl job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:8488:b0:479:13e9:3d64 with SMTP id 5b1f17b1804b1-4856eadba01mr59151605e9.15.1773757015602; Tue, 17 Mar 2026 07:16:55 -0700 (PDT) Date: Tue, 17 Mar 2026 14:16:49 +0000 In-Reply-To: <20260317-vmalloc-shrink-v5-1-bbfbf54c5265@zohomail.in> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260317-vmalloc-shrink-v5-0-bbfbf54c5265@zohomail.in> <20260317-vmalloc-shrink-v5-1-bbfbf54c5265@zohomail.in> Message-ID: Subject: Re: [PATCH v5 1/3] mm/vmalloc: extract vm_area_free_pages() helper from vfree() From: Alice Ryhl To: Shivam Kalra Cc: Andrew Morton , Uladzislau Rezki , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Danilo Krummrich Content-Type: text/plain; charset="utf-8" On Tue, Mar 17, 2026 at 01:47:33PM +0530, Shivam Kalra wrote: > Extract the page-freeing loop and NR_VMALLOC stat accounting from > vfree() into a reusable vm_area_free_pages() helper. The helper operates > on a range [start, end) of pages from a vm_struct, making it suitable > for both full free (vfree) and partial free (upcoming vrealloc shrink). > > Freed page pointers in vm->pages[] are set to NULL to prevent stale > references when the vm_struct outlives the free (as in vrealloc shrink). > > Signed-off-by: Shivam Kalra Reviewed-by: Alice Ryhl