From nobody Fri Feb 13 16:37:33 2026 Received: from mail-pf1-f180.google.com (mail-pf1-f180.google.com [209.85.210.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC5F34F602 for ; Thu, 23 May 2024 18:36:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716489387; cv=none; b=Oc2mo0gItCJpSLiCHt38emwjCdlzo2V0VdLb8lu0gMC9/zfQxJwGt2RpRC1IyAWrGt01MGLXzGMjKou3XNa0Mw3LvbnLntJv7m/PgUlNePlJ01FIBQRlvFmsFd/b/frBxvdi1ZO9MquS7znfFCRk2ELd9tApd2x2gCAS+gXCdik= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716489387; c=relaxed/simple; bh=OgXMrbQw5esj3pNjQhcGzhpumWC39Xp2gTHLG8/BMdE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=fwvKB74pSOVzkifVCZ3CPpPd3r4HjSoHJwNvoKWYlZjHj7XBdyPO0XKvCwpYVYY+4hz6kudqBTAGDjNGgkCclTldM61Be32wIQUC/rOc8yOk1nQuPI0C2kDLerMoMWOKPc87v4c4dxKOlE48riLMjHVS/auIEcv8TY1EpsiQ4N0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=purestorage.com; spf=fail smtp.mailfrom=purestorage.com; dkim=pass (2048-bit key) header.d=purestorage.com header.i=@purestorage.com header.b=FSVBIdPu; arc=none smtp.client-ip=209.85.210.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=purestorage.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=purestorage.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=purestorage.com header.i=@purestorage.com header.b="FSVBIdPu" Received: by mail-pf1-f180.google.com with SMTP id d2e1a72fcca58-6f8f34cb0beso3272b3a.1 for ; Thu, 23 May 2024 11:36:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=purestorage.com; s=google2022; t=1716489384; x=1717094184; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Qz+q3u/Fp0102KdTBvg4J3ovItadDXTAdO5aV1qWmSo=; b=FSVBIdPuRIIL4vrbmVyp1D/Mb9Jh1aH/4h4pDNRlKAHY+OqlEZmsg4a869XIhDS0yz Vhkm5mHaBgBDKjMMCShDO5ONlZY0cIvoD4+RFXHAT8wOgb0gI5xEE86ZjXDTiJgOAYJq FTG6Ncp4tC6LbOs5ql361CqAWIyy1wjeuxS3ZcalgOF67z+wjnb1gHKWw6C6/8UmZhwV u8xUWlEW/3CdtEjaR5GPKu0Hc8r1BjEnE2btsz7Y8+OIwpCde3cYq0qbFjfnHMZnRicK 9BgxPqoFBF1XBmE1L/LHFxjMX40ZLZ47FXDdjVui/OJa+nZTutkYkQlW7DPQzFw5UjmB hbSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716489384; x=1717094184; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Qz+q3u/Fp0102KdTBvg4J3ovItadDXTAdO5aV1qWmSo=; b=JONM0BWaH3L6e94UbhPde5dn+K3jvUcTPMu4nI1rKXYPtfoX7qXs+fDI425FCNaQH/ 66cA2fn40/Qx8epXahUGR79vEh+WVkAO3GnUNCrP3EKq12ykCQw6cY65VwbQzYv9GkX6 9a2kpIUwAMVDeFEvuLFNrG5fwI3aFx+srgKY6U9wsJd3tbXNohEUMt65H+zneMWgGBbJ TPAcGCQOVb3liqwZ6Zvj7uBZ3PGaJquaMiTKS37qlBAF4swgGigkjhqBPii7BRUa2Kwc iVWGCRA/wIFaKUvILKETRwZ/AXo7yhImeKEx4pJR3QYKqnFTPeUXfH24XiFwXy2UabsA UlCg== X-Gm-Message-State: AOJu0Yy+hLdE+O6tXNAYp/RLiK0yWz+Nzvap1aTUeK6NkTAm/2PoRmJC mq9AiqY0RtXxm0oZ3MFqgwBE/zMGqh5CGXnPHt5er5lE37gBfXM2Zu4ypHjW84s= X-Google-Smtp-Source: AGHT+IFUTsvXDTrQxXlh03uhTPfPZ/be+kqFgGy/t90jRL6U9LRtWnJ8XOVcA+NlDeCpNMF8onOypQ== X-Received: by 2002:a17:902:6505:b0:1f3:2f9c:bb72 with SMTP id d9443c01a7336-1f448125a9bmr3155455ad.5.1716489384110; Thu, 23 May 2024 11:36:24 -0700 (PDT) Received: from dev-yzhong.dev.purestorage.com ([208.88.159.129]) by smtp.googlemail.com with ESMTPSA id d9443c01a7336-1f303b062e5sm71161015ad.219.2024.05.23.11.36.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 May 2024 11:36:23 -0700 (PDT) From: Yuanyuan Zhong To: Andrew Morton , David Hildenbrand , Matthew Wilcox Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Yuanyuan Zhong , Mohamed Khalfella Subject: [PATCH] mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap_lock again Date: Thu, 23 May 2024 12:35:31 -0600 Message-Id: <20240523183531.2535436-1-yzhong@purestorage.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" After switching smaps_rollup to use VMA iterator, searching for next entry is part of the condition expression of the do-while loop. So the current VMA needs to be addressed before the continue statement. Fixes: c4c84f06285e ("fs/proc/task_mmu: stop using linked list and highest_= vm_end") Signed-off-by: Yuanyuan Zhong Reviewed-by: Mohamed Khalfella Acked-by: David Hildenbrand --- fs/proc/task_mmu.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index e5a5f015ff03..f8d35f993fe5 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -970,12 +970,17 @@ static int show_smaps_rollup(struct seq_file *m, void= *v) break; =20 /* Case 1 and 2 above */ - if (vma->vm_start >=3D last_vma_end) + if (vma->vm_start >=3D last_vma_end) { + smap_gather_stats(vma, &mss, 0); + last_vma_end =3D vma->vm_end; continue; + } =20 /* Case 4 above */ - if (vma->vm_end > last_vma_end) + if (vma->vm_end > last_vma_end) { smap_gather_stats(vma, &mss, last_vma_end); + last_vma_end =3D vma->vm_end; + } } } for_each_vma(vmi, vma); =20 --=20 2.34.1