From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id BE94015A86B for ; Wed, 25 Jun 2025 05:58:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750831104; cv=none; b=OjG9U8cr1r8DGAH8gXJWt4mTsvKrWNzehd6qebHOLwOm6BlW84s7+JU1QjnMzlgyjiZnLUfXHNgUPoMGf8DmJnpDPl4faCp+YvIzz4U+OBLo9YORiX0crDxz82IABI3Wvcxc2z1u8cZsc7rMAz+1E+EI6Nd6PXx8okeboiYRM0k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750831104; c=relaxed/simple; bh=dR/yVb8mTKGFPybcX74TjTQAJnnoN5vVU6+SuKY1VSQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=BnXJkC0EnqnUcaVxCP4E26mIRe4S8tAmAZw9OQ12qsFFY+Tot24AUKtagvIFji6nfDT+c1B34LFjeeFL+LahFSBv8DWI1bPQq1ZZSsi4Mvv9P1rfioNyFN3qhzl8Ml21SEL5Ulh1eqNvBA7PqW58/5LKJ1I6L7ToyLt6LN4eZEM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 083321063; Tue, 24 Jun 2025 22:58:04 -0700 (PDT) Received: from MacBook-Pro.blr.arm.com (MacBook-Pro.blr.arm.com [10.164.18.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 54A243F63F; Tue, 24 Jun 2025 22:58:18 -0700 (PDT) From: Dev Jain To: akpm@linux-foundation.org, david@redhat.com Cc: ziy@nvidia.com, baolin.wang@linux.alibaba.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com, baohua@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dev Jain Subject: [PATCH v2 0/3] Optimizations for khugepaged Date: Wed, 25 Jun 2025 11:28:03 +0530 Message-Id: <20250625055806.82645-1-dev.jain@arm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch series uses PTE batching to optimize two functions, and also addresses a race condition. --- @David I did not make the clear_full_ptes clean up since that will require some more work than I originally thought :) v1->v2: - Use for loop instead of do-while loop (Lorenzo) - Remove folio_test_large check since the subpage-check condition will imply that (Baolin) - Combine patch 1 and 2 into this series, add new patch 3 Dev Jain (3): khugepaged: Optimize __collapse_huge_page_copy_succeeded() by PTE batching khugepaged: Optimize collapse_pte_mapped_thp() for large folios by PTE batching khugepaged: Reduce race probability between migration and khugepaged mm/khugepaged.c | 77 ++++++++++++++++++++++++++++++++++++------------- 1 file changed, 57 insertions(+), 20 deletions(-) -- 2.30.2