From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FAF1C021A4 for ; Mon, 24 Feb 2025 10:25:36 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BE7E96B007B; Mon, 24 Feb 2025 05:25:35 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B972D6B0083; Mon, 24 Feb 2025 05:25:35 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A85656B0085; Mon, 24 Feb 2025 05:25:35 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 8AEBA6B007B for ; Mon, 24 Feb 2025 05:25:35 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id B6EACC1049 for ; Mon, 24 Feb 2025 10:25:34 +0000 (UTC) X-FDA: 83154456588.01.2E91FEC Received: from mail-qt1-f169.google.com (mail-qt1-f169.google.com [209.85.160.169]) by imf28.hostedemail.com (Postfix) with ESMTP id E6D91C0006 for ; Mon, 24 Feb 2025 10:25:32 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=qSv2Ix+9; spf=pass (imf28.hostedemail.com: domain of jackmanb@google.com designates 209.85.160.169 as permitted sender) smtp.mailfrom=jackmanb@google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1740392732; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=i4eleRcznfjhdEtYR1eZovpdeENk7cHdBNblRPiSyMY=; b=DWLVCz9IHDBeu16wi2n2KVBR5+iC1FOyogDv6ZYQurT4ONuSAw8hAsskxsWnDd/m+Bc9P1 REtteV0dx9jRSk7u8/1RkL2afro84KAwUe89xipwlx/I0WFqe8/0oWet0GkoK2OaS9Kmsq FkcP07ZukZpnXHwrijQscYUcNdVxGUE= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=google.com header.s=20230601 header.b=qSv2Ix+9; spf=pass (imf28.hostedemail.com: domain of jackmanb@google.com designates 209.85.160.169 as permitted sender) smtp.mailfrom=jackmanb@google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1740392732; a=rsa-sha256; cv=none; b=nYsXhEgS8MK7YN24r24PYGobkMoWy2Ed0lK9sdenj7e6L7Fsb70s3VHf1duNq5NztBjecO Sx/0owl13qy2feLzzdPhIxKwxAjlKxxmcCv1BbwmghXg/L91aZr+28cOPY8vWs6wtRT4TV 6CG7lhRemcLUZfK4cS1xnAj2SUrUE7U= Received: by mail-qt1-f169.google.com with SMTP id d75a77b69052e-471fbfe8b89so551801cf.0 for ; Mon, 24 Feb 2025 02:25:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1740392732; x=1740997532; darn=kvack.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=i4eleRcznfjhdEtYR1eZovpdeENk7cHdBNblRPiSyMY=; b=qSv2Ix+9bWtbvwX9e7H39kVY0Czw4ZarJDwEIlhv85olYcdTcYZoU6tHptLK5p1UXw Z7xSLtIhghbxHoZEL/DFcz54m7rbo2KNuBcWxVYyIg7CZY4xmfBHxI1fS35c4TK+NllZ xCfLbfmz8m5b7PCe6tGU0swi2StJv9IHP4Ot+H343PsyUEP0DTnfqtUD4zBo4qWOx+HZ 6u/RP4K8eTOtBYlzcVzxZvJ3m4l5tKLQkECwzEGTz3pi1GRscRTWwpt+DkZJ7SgWolPP zliJCx6vj82W/nyiQLq4RYSL6Ei20s1rAOpEzWZASQ9kHgp6JDAildrNpvKNyJk4ij4A MzLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740392732; x=1740997532; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=i4eleRcznfjhdEtYR1eZovpdeENk7cHdBNblRPiSyMY=; b=mfSOdTSs78I4+djp8WSkhIPOyYDB7jE29Vgp2sPdbOzhM/Uys23czMuojkMBwpMpDV 9E1up2JvvcZkmLgDYKCqs5AJAayY9raRiegV7cxMt4F7lS5HU1YjX4TIwOC+19fY6C9M vY2JhmgX6oOX2IPK7/XizVpapzqCLbk1ELslxmc8fdhPy/AafsxVZEzskYa1esqc61Z1 Qc/Fsij4B+gvOHz2wEfcqeGkEFLHmUTpOOUiCquvYegqDsg28BhOROPLmMM6Odjfnn9l ljvI6k0RGpkuqMQc4zccodjW3R6j6STizPTXEGVoKprR6Uk8db7F1KVfjbHZuYGvRyGr 8xEw== X-Forwarded-Encrypted: i=1; AJvYcCUmCKqSR1LGUdyoONTYo6gh36yqNxYlqptNicCePoFFa+xioxm+S/vMyy0h0UcmLFDd2ZoK+z4NSw==@kvack.org X-Gm-Message-State: AOJu0YxOdSN3uEry/YAz7VdXiH/aXo1T3T4t3pCPPyhchDLSKi8GrK+v p7G7svkmjEQOPvmnZ0tB0VZkyCNZ9RHCntHFitXqoqmYBAHg12VJk3bwemwOPM21IbIt99+S9Zm o6bNrHmEWeUY5muqb9Z2JozFJ2awr+bMAGzDgz93EQmIqnFj3aMVT X-Gm-Gg: ASbGnctyCHCln7pzT2bYRD+5g8udwcqGIoE7joZ1rmGt5aYIWy7/BrmvbJKEZE48TxE dCeFEnRVH9TltQoydGVjrhXN2s0X+a8nAKgKjGEJYcOSYMxCRZShnFmXu8ZY/QKeCHs91Rxmg1U KRahnTV1QvwPCqbwTrU3cCKVmiWHHdBJWq2vflNQ== X-Google-Smtp-Source: AGHT+IHcORwH6MkXUIuhNvKpirxHiqnifBvxkOChYQByYI8hUWdzlbaftAH/T5c5oza1wGn0qb+0RWy8+yWXJkLeVVE= X-Received: by 2002:ac8:5912:0:b0:466:8887:6751 with SMTP id d75a77b69052e-47234ccbe60mr5534931cf.23.1740392731839; Mon, 24 Feb 2025 02:25:31 -0800 (PST) MIME-Version: 1.0 References: <20250221-mm-selftests-v2-0-28c4d66383c5@google.com> <20250221-mm-selftests-v2-8-28c4d66383c5@google.com> In-Reply-To: <20250221-mm-selftests-v2-8-28c4d66383c5@google.com> From: Brendan Jackman Date: Mon, 24 Feb 2025 11:25:20 +0100 X-Gm-Features: AWEUYZmHq3d45n5Wg3TPcz7MJBRGHJ_DS5l_Brf3CVevVsclDXFs37_wvvoTAUo Message-ID: Subject: Re: [PATCH v2 8/9] selftests/mm: Skip map_populate on weird filesystems To: Lorenzo Stoakes , Andrew Morton , Shuah Khan Cc: Dev Jain , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: E6D91C0006 X-Stat-Signature: e7ekoiyj66bzn654pyzcdddtk3em511c X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1740392732-576840 X-HE-Meta: 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 wOMR0wcJ 57TS4ak0j/L93nGqEfXgPpW9NlgH7hwdrvbWPR93ggilQDUM2tfVeWvIUmewoVfqGGJZQOKuQCIuHdcNHZREiZTX1vSimgR1RqpEw58If5gANJjz5fvjA1yCaadCTsp/U2eNjTutwIgC7NaWBCBfC2tifWzZ3T0XCQ3h785Bs0OFCBD885KGtSlRoCU2nC6c+CPSOJmxKevSgmXVdrrDkuftDaB1QgjcKi7uK5Y2NheByexqg0zuK3y0KD6nUe6Oxgb5QIL7AbyZansU= X-Bogosity: Unsure, tests=bogofilter, spamicity=0.477337, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, 21 Feb 2025 at 19:26, Brendan Jackman wrote: > > It seems that 9pfs does not allow truncating unlinked files, Mark Brown > has noted that NFS may also behave this way. I have not investigated at all but I _think_ over the weekend I saw ftruncate() failure on a QEMU guest where /tmp was tmpfs. Most likely explanation is user probably error (like /tmp wasn't actually tmpfs or the tmpfile() did not actually come from /tmp). But still, maybe just waving my hands and going "buggy filesystem, ignore" wasn't so smart. I should actually understand the problem before switching off tests. So, I think this and the other "ignore on weird filesystem" patch 9/9 should be ignored for the moment.