From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A0594EFCD6E for ; Mon, 9 Mar 2026 11:56:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4F80B6B00A3; Mon, 9 Mar 2026 07:56:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4D6386B00A5; Mon, 9 Mar 2026 07:56:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1FDA06B00A6; Mon, 9 Mar 2026 07:56:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 059776B00A3 for ; Mon, 9 Mar 2026 07:56:00 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id C9B05160162 for ; Mon, 9 Mar 2026 11:55:59 +0000 (UTC) X-FDA: 84526370838.16.19365A3 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf15.hostedemail.com (Postfix) with ESMTP id B4A40A000D for ; Mon, 9 Mar 2026 11:55:57 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=sRIUkNWG; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf15.hostedemail.com: domain of devnull+shivamkalra98.zohomail.in@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=devnull+shivamkalra98.zohomail.in@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1773057357; h=from:from:sender:reply-to: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=VKfOdw0rtpU8pZtSCYHf2LHRi3ob+u1sPHWVt4qnD6s=; b=nrO7njQexxtZ5HVgolDaHbNrS81NmaNTF2V4VW7nYfVrOvk08mk8S1RhiTBOiT8rc1Qk0c EWpC6Q8DvNKHvdC5pGCjpxniArzalPC79/8BfdnhVK+RCzWDuu8FNScpbbMkU68C7l3dmZ 2ou26ItE5K11/1SJrelhiMnJqi1yQss= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1773057357; a=rsa-sha256; cv=none; b=bwXWfH5e5dXCp3zzVIBPqHMolzLJU5Oqk2FSb42IxiFEiYhKVOu3LWAsRMerKBJ9snD7QU TiMaZzOYlNWa+ElkTShtx2HSqS9iTulcg3+BbrwxrII5HTlePsX2AOOYZDbPpMElXGHEam GwCUJxv/O8gGEms5oY4eAgP3aMcL55U= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=sRIUkNWG; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf15.hostedemail.com: domain of devnull+shivamkalra98.zohomail.in@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=devnull+shivamkalra98.zohomail.in@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 9F0604383F; Mon, 9 Mar 2026 11:55:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 7D3EBC2BC86; Mon, 9 Mar 2026 11:55:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773057356; bh=Tkc2G5v7MJj/0+toMiZPKrDMqernsxUrrJDbe2DWPYM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=sRIUkNWGsABFa8kdDDrR33aTDFr/sXXQOoLU63pncZ/FqAQzJYRvhu6qjK5UFcYlJ 6Qenp9K4h9HV3UMFvL/MslPrggOsM6rmK5ucf9Tbm0JEvyevEDG6roA0BqAOHg+Ew9 7uGjcT/OKSi72L3mFMVgTn8hwLjROUAOjA9Z37tUtbVMs4KSenJontUo5flAOWbNcM J3gE3K2YIs+XC73DKFau0KJiw9U79kgy4WyuSVMhfWoUoDtGIYYoCtdgPdtAU/Np0H l1AWbI+vXxyWfXZJD6soigm8fzdKlwNfZDcTzvrVxeEph7FbtKgLl/g2HjLOHIrkdq hv8tT8ljnLHrA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FED5EFCD9C; Mon, 9 Mar 2026 11:55:56 +0000 (UTC) From: Shivam Kalra via B4 Relay Date: Mon, 09 Mar 2026 17:25:45 +0530 Subject: [PATCH v3 1/2] mm/vmalloc: extract vmalloc_free_pages() helper from vfree() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260309-vmalloc-shrink-v3-1-5590fd8de2eb@zohomail.in> References: <20260309-vmalloc-shrink-v3-0-5590fd8de2eb@zohomail.in> In-Reply-To: <20260309-vmalloc-shrink-v3-0-5590fd8de2eb@zohomail.in> To: Andrew Morton , Uladzislau Rezki Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Alice Ryhl , Danilo Krummrich , Shivam Kalra X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1773057354; l=2510; i=shivamkalra98@zohomail.in; s=20260212; h=from:subject:message-id; bh=K+fKY35rqal1HjSu0w8XUZyvTIb7GSRojmpzX5n0cKs=; b=tMvxDF4NmGBn266aUsP+BKfmmmHzs/OZbd58axuJ2Mp3ZLEdgFFSuV5XELVT1XA29RKBD299L /+X1aDNpFovBk90VI4PO/fFT8dyB3TnaE17p1U4Enf3NXpoaaJacXwE X-Developer-Key: i=shivamkalra98@zohomail.in; a=ed25519; pk=9Q+S1LD/xjbjL7bEaLIlwRADBwU/6LJq7lYm8LFrkQE= X-Endpoint-Received: by B4 Relay for shivamkalra98@zohomail.in/20260212 with auth_id=633 X-Original-From: Shivam Kalra Reply-To: shivamkalra98@zohomail.in X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: B4A40A000D X-Stat-Signature: z3uskoxhs5by37rj8b45chbum5rwhuna X-Rspam-User: X-HE-Tag: 1773057357-337011 X-HE-Meta: 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 UBHwbjvH kAhwzJJFJRijJB/z7VGDo6U2594XhQIBQsqEwoRuH1RfLBUv7KEBCOm9MypRMVrlnVZnbFzQw7A7vSKdOAx0DLeFMwRQQs9qyCtcbB02NH5rc7La3tzLt41roRhOfrI61ELRU9IDPpeY1XZtSEMBbFDA/+XXPrncCVGm+JgcKMCD4X1flMTZ4v+WpU6urKmhMhZt52AguVyZvqK6l/rabb8m+19qK4DlyJyvBzegNmV2NIvB8XGYvnpkxjWCPbK+BCQrMAwqCezvEY7vtD+Pa3LPUGZDh2ouYBYs8/ntmJB0RVigHe47jTojqFs33L8QDYkFasNU6iqQqSmxyNCx2UuFyI6sxN7ho2SLEYC6qPFPBQ0krtNV79D/dnA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Shivam Kalra Extract the page-freeing loop and NR_VMALLOC stat accounting from vfree() into a reusable vmalloc_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). No functional change. Signed-off-by: Shivam Kalra --- mm/vmalloc.c | 46 ++++++++++++++++++++++++++++++++-------------- 1 file changed, 32 insertions(+), 14 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index c607307c657a..42ae68450a90 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -3416,6 +3416,36 @@ void vfree_atomic(const void *addr) schedule_work(&p->wq); } +/* + * vmalloc_free_pages - free a range of pages from a vmalloc allocation + * @vm: the vm_struct containing the pages + * @start: first page index to free (inclusive) + * @end: last page index to free (exclusive) + * + * Free pages [start, end) updating NR_VMALLOC stat accounting. + * Caller is responsible for unmapping (vunmap_range) and KASAN + * poisoning before calling this. + */ +static void vmalloc_free_pages(struct vm_struct *vm, unsigned int start, + unsigned int end) +{ + unsigned int i; + + for (i = start; i < end; i++) { + struct page *page = vm->pages[i]; + + BUG_ON(!page); + /* + * High-order allocs for huge vmallocs are split, so + * can be freed as an array of order-0 allocations + */ + if (!(vm->flags & VM_MAP_PUT_PAGES)) + mod_lruvec_page_state(page, NR_VMALLOC, -1); + __free_page(page); + cond_resched(); + } +} + /** * vfree - Release memory allocated by vmalloc() * @addr: Memory base address @@ -3436,7 +3466,6 @@ void vfree_atomic(const void *addr) void vfree(const void *addr) { struct vm_struct *vm; - int i; if (unlikely(in_interrupt())) { vfree_atomic(addr); @@ -3459,19 +3488,8 @@ void vfree(const void *addr) if (unlikely(vm->flags & VM_FLUSH_RESET_PERMS)) vm_reset_perms(vm); - for (i = 0; i < vm->nr_pages; i++) { - struct page *page = vm->pages[i]; - - BUG_ON(!page); - /* - * High-order allocs for huge vmallocs are split, so - * can be freed as an array of order-0 allocations - */ - if (!(vm->flags & VM_MAP_PUT_PAGES)) - mod_lruvec_page_state(page, NR_VMALLOC, -1); - __free_page(page); - cond_resched(); - } + if (vm->nr_pages) + vmalloc_free_pages(vm, 0, vm->nr_pages); kvfree(vm->pages); kfree(vm); } -- 2.43.0