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 1B177F94CB7 for ; Tue, 21 Apr 2026 23:26:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 64B7B6B0005; Tue, 21 Apr 2026 19:26:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5D57A6B0088; Tue, 21 Apr 2026 19:26:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4C3696B0089; Tue, 21 Apr 2026 19:26:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 381776B0005 for ; Tue, 21 Apr 2026 19:26:29 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id E4F5D1A1059 for ; Tue, 21 Apr 2026 23:26:28 +0000 (UTC) X-FDA: 84684149256.05.D592998 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf24.hostedemail.com (Postfix) with ESMTP id 56F9A180003 for ; Tue, 21 Apr 2026 23:26:27 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=T6RLxjiS; spf=pass (imf24.hostedemail.com: domain of dennis@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=dennis@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1776813987; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=jgLAbKUsjyL598uT9cpCsbi7VPzdRTqvVv8AUtzu0YY=; b=F7EzsSaaUiiqvcVwNr6ERR7LSzwWji/ojyG44XuP1rPOY/OFOcy2q8H57wUVQ73z8VdGIQ S1GgXRz2g9JOY3kvdjv+gKRb1ma3QWD47zh4VCe7GQ6+SG/vWBLua8JKFDpxFeXS4mj4Ip Tknlb8GaZRPC03EIcS3Sywk6mAOHDTw= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1776813987; a=rsa-sha256; cv=none; b=j2HTgOgZQS0bi8KqM4j5qjCAhPrDvoqdfyUYdDUr8X42nhE173z7wz4dcCPBKWg1CWacAc iMxIjeh7ybr8yahIll74PdITgV7PPFpOaTwsjDZnHe/27gGAyueKdXlAe807ekc0LM0n9Q iEEl5QISJ4XN4XOmkOpTdKNPT5EydWM= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=T6RLxjiS; spf=pass (imf24.hostedemail.com: domain of dennis@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=dennis@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id A95DC600AE; Tue, 21 Apr 2026 23:26:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0EF70C2BCB0; Tue, 21 Apr 2026 23:26:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776813986; bh=/let+R26XmDoHPbQeUMhH4onx0DaQ8ZuXi5VStvneik=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=T6RLxjiS4o6mjnOCVvD4kMntKjEJOCJSOR1JKi4YoU6DfFE4cBpr0+umxWHiEzO8U 7oaCcoTHU+TfRcSC4vqI86VffL3oZcXhodcB7zgLkmxdmxEfa0BUM89/b2FkWNLpY1 sLBO+4MUONxrbuqjhMwua7meya1xHf6vgEioxbqY4tiU3lzsi/cB0OqL55DUx/MKAQ vuYUVx5zTyHiZoOeQwZw8KiWvsHHUx0zCbvUx7Lz4yayLmTcL9XsDamnMzgAM/VIvZ vMo9GsTxVDb0MogpB0D42zJ7SDnTkv1bAoBgOG0dgolerIxM7G0X6x9nWdhPTH1S2y HusNDsV6E19HA== Date: Tue, 21 Apr 2026 16:26:24 -0700 From: Dennis Zhou To: Joonwon Kang Cc: dennis@kernel.org, tj@kernel.org, cl@gentwo.org, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, dodam@google.com Subject: Re: [PATCH v3 1/3] percpu: Fix wrong chunk hints update Message-ID: References: <20260410174417.1450834-1-joonwonkang@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260410174417.1450834-1-joonwonkang@google.com> X-Stat-Signature: hyceyznt3bqrrzwq8k5yxu8eerzqbufu X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 56F9A180003 X-Rspam-User: X-HE-Tag: 1776813987-558235 X-HE-Meta: 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 v/6GmrbU U1ERef1VLIiKAzgScR+XUuB9jc7N4Uimef13Ek0ZuaJ1mAsIhSpJLnU3pxpa+TqdUaGWWaFJ0DHF4pZWTAKG4R1P4ShaQOA5oAlQC43u6vHCINlA0sbuQBNeph38v29av14B7GTEC4C9gWF2LcY0gxaVYFOkTVM2gh9P20l3GTRUhh370jPrzJ7utU3TMVmA5PUEgLuy+NSzgH5V4hjlzSaG0aFHaBH4pXYnTfpxMcDDSIT66IDnLnsNpDj/U5grO6rXV Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, On Fri, Apr 10, 2026 at 05:44:15PM +0000, Joonwon Kang wrote: > Chunk end offset was set to a block end offset, which could prevent > chunk hints from being updated correctly. It was observed that the chunk > free size gets minus or shorter than the actual free size due to this. > This commit fixes it. > > Signed-off-by: Joonwon Kang > --- > v3: Initial version. > > mm/percpu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/percpu.c b/mm/percpu.c > index 81462ce5866e..3ecd86096641 100644 > --- a/mm/percpu.c > +++ b/mm/percpu.c > @@ -1054,7 +1054,7 @@ static void pcpu_block_update_hint_free(struct pcpu_chunk *chunk, int bit_off, > else > pcpu_block_update(&chunk->chunk_md, > pcpu_block_off_to_off(s_index, start), > - end); > + pcpu_block_off_to_off(e_index, end)); > } This needs a fixes tag for: Fixes: 92c14cab4326 ("percpu: convert chunk hints to be based on pcpu_block_md") Reviewed-by: Dennis Zhou Thanks, Dennis > > /** > -- > 2.53.0.1213.gd9a14994de-goog >