From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.184 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794397168; b=YYac0OV0NTM7rohHn6/YP5ghLo17HMeq8wq3zN1zp5kD0FzGN8oWuS7i2CqbZMQXXV2u 4e1A93Yg7BScub3SVD/fs2CRaarpb8Nky7IrLsBKDFaq3zD9SMo3eCJMCOVwB2XxdZZCS 58V8pv4GolVh6zvaSUvZsNw7rHu5M5aJX8gpSO5457pKG6NUwSEZbVMm3UsCexrVJh7iH hngxRZr+lqVExHlRwPWwpYIj+dGHOUUSnq4a4TCYNNf77i7xO4t4wfKkz3RPNrpXn9hQ5 6arXIueZrrTIRlTb7jIb97+yQDfP0a1St2bURjtXPxGXCJwZpNn21chgxf5tWMr9Adw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794397168; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=ss6GPqajhnLoAGvpkwWgAL30Fbn2tVqWEm0t1Mamd/I=; b=QX3G9MidD93JRNo1vP5PFMy7EtyINhqhg2VypA2d13FgLvZqUoLwnYSadummr6vpTqT4 ztJmgPNeojucj32E3ytDjaPor/kFiuwBMblbYahRnzA82FbPYLgKvRBoZiJ96bHQac3fI u1lxmT593jP5mlwsJvZb7X9zBKUJAbTrVPPJRkEiR2TQmMePTQT6TY5bUfI34G7CxYoOQ 1nd/vAYEfRhwn0aptSrqSJssnI1aTKxRi1d8dKrVWabH9jB1oltIL8mgvgkYiyVq0t5I4 EDDkWM2h8iVC7UezLS11w7CAxcD9VHi5jWF1eTj5rNEsNQ6PX48MTqJ6xi2hM7K7yhA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=FYJ36vzk; arc=none smtp.remote-ip=95.215.58.184 Received: from mta1.migadu.com (out-184.mta1.migadu.com [95.215.58.184]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA058606A32E for ; Wed, 11 Nov 2026 11:39:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org BA058606A32E Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=FYJ36vzk X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=PxRmG2FWyo+pFqNDGwdneDF6Wr5yBgEA/EARM77L5Wg=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794397165; v=1; x=1795001965; b=FYJ36vzksOCCsexC4Nfc0EjBeGRz02DN2aWs5F+SXhhYb1uihrcW4LnX6Z7s7sylG5IMBCBm bHF7fJg2UO01tXG8ZRmWqkalW06PF9jYozU3pm4rIsnaV0yGASbqMBLttquRoIJ+iGyHLzqA8Np fG5mN9dypHX+/kIKrEZ8vrgc= X-Envelope-To: linux-kernel@vger.kernel.org Received: by mta10.migadu.com with ESMTPS id 997e08426fbd59bb; Wed, 11 Nov 2026 11:39:25 +0000 X-Mizu-Trace-ID: 997e08426fbd59bb X-Migadu-Flow: FLOW_OUT From: Usama Arif To: Andrew Morton , apopple@nvidia.com, byungchul@sk.com, david@kernel.org, gourry@gourry.net, jannh@google.com, joshua.hahnjy@gmail.com, liam@infradead.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, matthew.brost@intel.com, mhocko@suse.com, pfalcato@suse.de, rppt@kernel.org, surenb@google.com, vbabka@kernel.org, ying.huang@linux.alibaba.com, ziy@nvidia.com, kas@kernel.org, hannes@cmpxchg.org, riel@surriel.com, shakeel.butt@linux.dev, kernel-team@meta.com, baolin.wang@linux.alibaba.com, Nico Pache , ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev Cc: Usama Arif , stable@vger.kernel.org Subject: [PATCH 3/3] fs/proc/task_mmu: account device-private PMDs as present in smaps Date: Wed, 11 Nov 2026 03:38:31 -0800 Message-ID: <20261111113904.650722-4-usama.arif@linux.dev> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261111113904.650722-1-usama.arif@linux.dev> References: <20261111113904.650722-1-usama.arif@linux.dev> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Device-private PMDs represent mapped pages, but smaps_pmd_entry() passes present=false to smaps_account(). That treats them like migration entries: mapcounts are ignored, PSS is charged in full, and exclusive mappings are accounted as shared. Match smaps_pte_entry() and mark device-private PMDs as present so smaps_account() uses mapcounts for PSS and private/shared accounting. Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages") Cc: stable@vger.kernel.org Signed-off-by: Usama Arif --- fs/proc/task_mmu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index c0d391186c2b8..ad97532fc1184 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1032,8 +1032,11 @@ static void smaps_pmd_entry(pmd_t *pmd, unsigned long addr, } else if (unlikely(thp_migration_supported())) { const softleaf_t entry = softleaf_from_pmd(*pmd); - if (softleaf_has_pfn(entry)) + if (softleaf_has_pfn(entry)) { + if (softleaf_is_device_private(entry)) + present = true; page = softleaf_to_page(entry); + } } if (IS_ERR_OR_NULL(page)) return; -- 2.53.0-Meta