From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2EE30394499 for ; Tue, 12 May 2026 22:49:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778626175; cv=none; b=O5WmMVxRklpOrTbfr3Wn9Cc/Kx3LRE505JmHyrIiGg6MyO4v1RXqQegBGf0hEp3Ye0I45x6Mlo+EM/wLgoN3oCrqxGatORBLDvKZx1+GftJ/rmd5IRNRvVl+reqXyVZfq0PJ7rY2L79C58S4QWiyGYiCpDU6c4n/lBBOhZlMjiE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778626175; c=relaxed/simple; bh=PvdsKumesBAm1xG9UBvy8mbppTQNs13p2zUiCc1ujPQ=; h=Date:To:From:Subject:Message-Id; b=bDKViOA8i08xb9aK9StG9ffu7dWncYbDXbfcFlJZlbupflytjp0Ulvo9KUzlEBqhhy2X5dQmkl0kQiSWeTg80Ig+xjizGofL0GivhHVp9gdYGi9mvLjBSKWKH0MOJ9jji79yGMkog48cymr90CYixxH6smNGKFRIAL7sASjoM0s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=vspy4peB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="vspy4peB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 24E78C2BCF6; Tue, 12 May 2026 22:49:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1778626174; bh=PvdsKumesBAm1xG9UBvy8mbppTQNs13p2zUiCc1ujPQ=; h=Date:To:From:Subject:From; b=vspy4peBbbt2JFM6qVct0IrjfSAzfsQ1W3vGOlPJVmZTiND8OZwV2Q9qGMSyjxz6Z H2D2qy2tETF78yuw5sw02Nv6K3myfrDbvwmB85DUrO6fLMbCO4Nbcc9AES90nyH+6v +OR+u6MM0wdGNLP1DXmGEZOGHjRYs9JTmO7ueNPE= Date: Tue, 12 May 2026 15:49:31 -0700 To: mm-commits@vger.kernel.org,tj@kernel.org,dodam@google.com,dennis@kernel.org,cl@linux.com,joonwonkang@google.com,akpm@linux-foundation.org From: Andrew Morton Subject: + percpu-fix-wrong-chunk-hints-update.patch added to mm-new branch Message-Id: <20260512224934.24E78C2BCF6@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: percpu: fix wrong chunk hints update has been added to the -mm mm-new branch. Its filename is percpu-fix-wrong-chunk-hints-update.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/percpu-fix-wrong-chunk-hints-update.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Joonwon Kang Subject: percpu: fix wrong chunk hints update Date: Sun, 10 May 2026 07:21:46 +0000 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. Link: https://lore.kernel.org/20260510072149.1279887-1-joonwonkang@google.com Fixes: 92c14cab4326 ("percpu: convert chunk hints to be based on pcpu_block_md") Signed-off-by: Joonwon Kang Reviewed-by: Dennis Zhou Cc: Dennis Zhou Cc: Tejun Heo Cc: Christoph Lameter Cc: Signed-off-by: Andrew Morton --- mm/percpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/percpu.c~percpu-fix-wrong-chunk-hints-update +++ a/mm/percpu.c @@ -1054,7 +1054,7 @@ static void pcpu_block_update_hint_free( else pcpu_block_update(&chunk->chunk_md, pcpu_block_off_to_off(s_index, start), - end); + pcpu_block_off_to_off(e_index, end)); } /** _ Patches currently in -mm which might be from joonwonkang@google.com are percpu-fix-wrong-chunk-hints-update.patch percpu-do-not-trust-hint-starts-when-they-are-not-set.patch percpu-introduce-struct-pcpu_region.patch percpu-fix-hint-invariant-breakage.patch