From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7B2604279EE; Mon, 29 Jun 2026 15:04:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782745453; cv=none; b=XkZDt3D/LHfL55GcdmdB9nvkGu/Ama/5B6rG9Ag+SbwkkF+wN/1znM4uM55FZQamSXzAThY27Diafvq/QyWUK/r2iWNeCydOwmqvNDdIvdVhkR8gdcE3xA0SdLpcUOANeDN83ut7Cl62lviozeClE8mJhW+4xGkUzpOUjbldZck= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782745453; c=relaxed/simple; bh=xYdGs2hYm6cZgTn2nq/whsO7qcoa+Eo9Pq9YQgOxIco=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OFcYWywbRKg0ivMitpwFUVDcKV9iicKxQBoZ2ftAz7a37JjI1jM33DiM/NGCc34cuJX1CKwBtu58D1I6ElxzPnYKU7UVjox9mVBbJ8GeyZ3UrjCkapsEy7XkqtBOv11ElkG8Dh6MpaNso4jhE1eeLxLEeCLYTDCxyPY1owixHzo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PcDHXqhE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PcDHXqhE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90C4F1F000E9; Mon, 29 Jun 2026 15:04:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782745452; bh=tWUJODwdTE7pH27pI40oaqFE2CYlQJqY1Z9hmUi6ed8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PcDHXqhE/bIrZtFQ9F+4e4CNVz6V1zxlfjiFoRWxC1FDjE2JODm8vZb2iN6Eigzno Ph79Y9UrJqcVN+LGSlnPItEj4sZYiQkqg6bD+McwtzEJm66HSVr/MBs1XcEN6nv27W N6DCX7mWnMYR9EK7bLKbqxK+26Ff1GBjJqTcTEqCLkf/44WEU9mJaGc9wPRxLCBL5f ukj9O2dq8s1hFfITtdeXoOnwmL+lVdivY3/X1KUAuhE/5zGqtiK29pSEr3fHuXrtc8 bFud6jCxY+2pSJ2CEAJT3QQAG/uhAY1BuJQS0h1qZUw/Fu1/9VZd5+KoPGUtYMAjXP 3J8FGt4KLhgfg== From: Lorenzo Stoakes To: Andrew Morton Cc: David Hildenbrand , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Matthew Wilcox , Jan Kara , Rik van Riel , Harry Yoo , Jann Horn , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Xu Xin , Chengming Zhou , Miaohe Lin , Naoya Horiguchi , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Pedro Falcato , Peter Xu , Kees Cook , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [RFC PATCH 04/10] mm: update print_bad_page_map() to show virtual page index Date: Mon, 29 Jun 2026 16:03:44 +0100 Message-ID: X-Mailer: git-send-email 2.54.0 In-Reply-To: References: 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 is potentially useful debugging information and matches the existing page offset provided. We only do so if the VMA is not a shared mapping, as shared mappings ignore the virtual page offset. We use __linear_virt_page_offset() as the VMA may be shared. Signed-off-by: Lorenzo Stoakes --- mm/memory.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index f5eb06544ba4..7890e5200ecb 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -588,21 +588,23 @@ static void print_bad_page_map(struct vm_area_struct *vma, enum pgtable_level level) { struct address_space *mapping; - pgoff_t index; + pgoff_t index, virt_index; if (is_bad_page_map_ratelimited()) return; mapping = vma->vm_file ? vma->vm_file->f_mapping : NULL; index = linear_page_index(vma, addr); + virt_index = __linear_virt_page_index(vma, addr); pr_alert("BUG: Bad page map in process %s %s:%08llx", current->comm, pgtable_level_to_str(level), entry); __print_bad_page_map_pgtable(vma->vm_mm, addr); if (page) dump_page(page, "bad page map"); - pr_alert("addr:%px vm_flags:%08lx anon_vma:%px mapping:%px index:%lx\n", - (void *)addr, vma->vm_flags, vma->anon_vma, mapping, index); + pr_alert("addr:%px vm_flags:%08lx anon_vma:%px mapping:%px index:%lx virt_index:%lx\n", + (void *)addr, vma->vm_flags, vma->anon_vma, mapping, index, + virt_index); pr_alert("file:%pD fault:%ps mmap:%ps mmap_prepare: %ps read_folio:%ps\n", vma->vm_file, vma->vm_ops ? vma->vm_ops->fault : NULL, -- 2.54.0