From nobody Mon Feb 9 10:12:36 2026 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (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 08D3E27FE9C for ; Fri, 28 Feb 2025 16:55:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740761713; cv=none; b=GU+AtWun0QSIfQvK0aKNZPENXNcEttobcamdlSKwjp7EuTyCB4SVyrZyd7dQd9cdVA23/j/JEt0JREMz8w/URq5fP9yFl7UEXTc8ZGCND8Di32Sc0RG/qHLPysoGHvJq0nGt3br8qPOX3caCBB0ftmePWP7GLNcQW74MkMt/abM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740761713; c=relaxed/simple; bh=bqfaJLRcZyL7lK8SQBkzsqIdYVbbY09r1mSEFK/Nr80=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=iowWk3+tHXOaqyIcpPw2fpUyhDTJKxCaqWhtU9NCf3Jxlnx0LYnOpb/gZmNUIh4cjmypCAIlx71HXtL1brNR4qNMRGzSTI4QCqe2Tl0nNe+MTS0C7bntsz4DoKL9JYf62bDCAfaSEMnLBt2GvhR8t0E+EhmoWEvGj4HSyMPKtlg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jackmanb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Bkv5Z4BB; arc=none smtp.client-ip=209.85.128.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--jackmanb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Bkv5Z4BB" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-43aafafe6b7so16794745e9.1 for ; Fri, 28 Feb 2025 08:55:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1740761710; x=1741366510; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Y083FvFOZYoCnUIFRlzf3KdIVhM7Xy3dpgrJnz1PRMA=; b=Bkv5Z4BBl2uu1KIhclleMqZL059tOjjZ3/eT/1ZpnwYLrUrXUB4iCOiC1A3nr0kRH/ PE8mFEI/njsw7rzdtsU7S364JKgcB4FJxYoHnu255aCTYM4aEJhjBTdbauvRy+H2Fz5m k/4f3H4J2bx+cxg96ZIi7A+X7abqQOgu65PTvxAO03xtcBUxtAf27n4dRoJTGmoDMmpH uhBa9aXu6e6XWkB3BHlV9+/dM4N+yMvl5I/oplJ/iGzMumKGOjcwi85lnzizSB4+QAly lXVh0ttBMDzULLCnsZgHx/SQ3YfpX/unrFisUNDIq539/8PxiUhTFJQADw/0afBTwmWI pQ/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740761710; x=1741366510; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Y083FvFOZYoCnUIFRlzf3KdIVhM7Xy3dpgrJnz1PRMA=; b=RcI/uRgVszk+x4TvvonRqO8j4QZqUHjvd2nozN/VZl0tSFVDytZMeAJ/g8MOq3OFTs v8iLMM+uHMJ7/v/j/HyDK6099XJYqE6T5A/F7KWaC5vTQnXflb7eBBzSLvTJCgBheQic IUT25SiBaSNddBfOK7SbbaQJO8M/9dpWVautyy8BM3ZGi8H4mJZAPL6wjQPxEJqHUJNL jXvvzvqtLXHYMAVY5ONS7NW4lQtBRpSqPZPyjpNa0HJPJGOw1n6qU/0fuYSQYXXAsJKH MzEgLctf8EXAhFlpShx6Uc8+Cc1p1V28btmpKbWgaPegbZZltqx8CCAAmPv+SUm1QzqP WLFg== X-Forwarded-Encrypted: i=1; AJvYcCWRl37teDRri9G2Y18zpKolaIhltXG1bf45H86VbpywIuE03sDRuzO6dgTvysXNfk9jVklOoE1Eh41zRYw=@vger.kernel.org X-Gm-Message-State: AOJu0YxEUgu4B2XhzsOmiSVXTm7dwzhEHSBjv26vqMpDtbf8xYqp+vsj ig1Fxjl+lDuDkIRLl7zdW5w+hFYe6mtYUpqSf6esfY870l00CuN7SbFimMR24bZOhD8AjbD9n8e XuOzMtXLopA== X-Google-Smtp-Source: AGHT+IECfVJfBnP7dSUDnPjhj6/A2ktPEKiVIkWG9TWFGAz0YIN0dg2dmHqMiFJ6AA8ejEBgQ+HIjLpWvE2+0A== X-Received: from wmbfm10.prod.google.com ([2002:a05:600c:c0a:b0:439:81e4:9ca6]) (user=jackmanb job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:154e:b0:439:6a7b:7697 with SMTP id 5b1f17b1804b1-43ba670fb9bmr36911975e9.14.1740761710535; Fri, 28 Feb 2025 08:55:10 -0800 (PST) Date: Fri, 28 Feb 2025 16:54:55 +0000 In-Reply-To: <20250228-mm-selftests-v3-0-958e3b6f0203@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250228-mm-selftests-v3-0-958e3b6f0203@google.com> X-Mailer: b4 0.15-dev Message-ID: <20250228-mm-selftests-v3-7-958e3b6f0203@google.com> Subject: [PATCH v3 07/10] selftests/mm: Skip map_populate on weird filesystems From: Brendan Jackman To: Lorenzo Stoakes , Andrew Morton , Shuah Khan Cc: Dev Jain , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Brendan Jackman Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable It seems that 9pfs does not allow truncating unlinked files, Mark Brown has noted that NFS may also behave this way. It doesn't seem quite right to call this a "bug" but it's probably a special enough case that it makes sense for the test to just SKIP if it happens. Signed-off-by: Brendan Jackman --- tools/testing/selftests/mm/map_populate.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/self= tests/mm/map_populate.c index 5c8a53869b1bd287b09a250edf628a66c25c2439..433e54fb634f793f2eb4c53ba6b= 791045c9f4986 100644 --- a/tools/testing/selftests/mm/map_populate.c +++ b/tools/testing/selftests/mm/map_populate.c @@ -87,6 +87,13 @@ int main(int argc, char **argv) BUG_ON(!ftmp, "tmpfile()"); =20 ret =3D ftruncate(fileno(ftmp), MMAP_SZ); + if (ret < 0 && errno =3D=3D ENOENT) { + /* + * This probably means tmpfile() made a file on a filesystem + * that doesn't handle temporary files the way we want. + */ + ksft_exit_skip("ftruncate(fileno(tmpfile())) gave ENOENT, weird filesyst= em?\n"); + } BUG_ON(ret, "ftruncate()"); =20 smap =3D mmap(0, MMAP_SZ, PROT_READ | PROT_WRITE, --=20 2.48.1.711.g2feabab25a-goog