From owner-freebsd-hackers@freebsd.org Sun Dec 13 18:20:35 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id A0BE24BFCEB for ; Sun, 13 Dec 2020 18:20:35 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-qk1-x72d.google.com (mail-qk1-x72d.google.com [IPv6:2607:f8b0:4864:20::72d]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CvCW66f0cz4j1v for ; Sun, 13 Dec 2020 18:20:34 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-qk1-x72d.google.com with SMTP id z11so13658189qkj.7 for ; Sun, 13 Dec 2020 10:20:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=16fbN5++Egtl3oLjoHIPVpvpKk0kXoEByqnDhnw4B9U=; b=cWRW9aUYvzbSqiUI12CQp3ULeNMlaC5MkX2xJCfHKulyv430XZ4Q690x1/s8oHo2Qp 8qWajJP3CQz3+VrjNSUBPSIr1ajnjngri74+4qkDj6G3ABeED6Fu1hcbaQDNflF5Jp+R dguAYdPgc6kQ8WiFjaPMOiVbFbdU7ZqM4tow7D9yxDwmIGn7cNHk6KGZMI+y2wKLCRQC mO32WF8wl3DZPe1oeDwiPcZcUnsAPClkwh0gdYBxp7WmQm7bzUPzyVaqxj218KUiTNz1 NxDpITdCORkvl9kNf04oOTI5eKdTik7ZVDiHyxoTKbtEvdTIwdUB7L/7BeNxZjyy3zAc QAWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=16fbN5++Egtl3oLjoHIPVpvpKk0kXoEByqnDhnw4B9U=; b=mEkYsVBfOwuG69na0Yx8UPbliGnytAVraE0eXRuROWzdNxPgM6Xa51GdqjCyw36xOe 08ezUDCFjLqY2RCTBgL5E2kh+w1IhcQO3a9YHNtvbapdrNFvMWqbrx2N0hcupGHNjps/ rVuwO7bBeDoUaKV1SFdjCyc8JALp+IIZcb6/jTiWaWvf34K7hivLJBmf/i4LxNg6xojq ZT5PgX5wMDewKdk1nusfihlx3CbqhRKs45feQNqgkFXbX+VzasyMFsdVdyNRjoO3mtyD 8B6tff6a1qj9iaeM3vODu6BzNek6eSrPGdnMHdmV2bwxoL/hOgSDtKHnwgYLgrKTI+4f /g+Q== X-Gm-Message-State: AOAM532up4YatNmsvRztnyPyYuA2qnPFST403VuHrgbYsq6HSgOEDCKT 5wWv3pq79lsBAw2Yge7gf+gsye08wQ6JudPqv0sUow== X-Google-Smtp-Source: ABdhPJzqnZ3TkvaKMCTJRMlAOMaaiXC/BO1Tq8vSywDmuZ5z7ES/0mMhGUAeznldOIyKoNY/hZ0UR1cj8Esgh9NiE6A= X-Received: by 2002:a37:a614:: with SMTP id p20mr28352494qke.359.1607883633583; Sun, 13 Dec 2020 10:20:33 -0800 (PST) MIME-Version: 1.0 References: <6dd927984d69ef0e95e1e90651bcd8087bc4eec4.camel@freebsd.org> In-Reply-To: <6dd927984d69ef0e95e1e90651bcd8087bc4eec4.camel@freebsd.org> From: Warner Losh Date: Sun, 13 Dec 2020 11:20:22 -0700 Message-ID: Subject: Re: char devices without SI_UNMAPPED? To: Ian Lepore Cc: alan somers , FreeBSD Hackers X-Rspamd-Queue-Id: 4CvCW66f0cz4j1v X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=bsdimp-com.20150623.gappssmtp.com header.s=20150623 header.b=cWRW9aUY; dmarc=none; spf=none (mx1.freebsd.org: domain of wlosh@bsdimp.com has no SPF policy when checking 2607:f8b0:4864:20::72d) smtp.mailfrom=wlosh@bsdimp.com X-Spamd-Result: default: False [-0.72 / 15.00]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[bsdimp-com.20150623.gappssmtp.com:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FORGED_SENDER(0.30)[imp@bsdimp.com,wlosh@bsdimp.com]; SUBJECT_ENDS_QUESTION(1.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::72d:from]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FROM_NEQ_ENVFROM(0.00)[imp@bsdimp.com,wlosh@bsdimp.com]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[bsdimp-com.20150623.gappssmtp.com:s=20150623]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[bsdimp.com]; NEURAL_SPAM_MEDIUM(0.28)[0.283]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::72d:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::72d:from]; R_SPF_NA(0.00)[no SPF record]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-hackers]; FREEMAIL_CC(0.00)[gmail.com,freebsd.org] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.34 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 13 Dec 2020 18:20:35 -0000 On Sun, Dec 13, 2020 at 11:18 AM Ian Lepore wrote: > On Sun, 2020-12-13 at 10:27 -0700, alan somers wrote: > > I'm trying to exercise the aio code that handles character devices > > that > > don't set the SI_UNMAPPED flag. But I can't find any. Are there any > > remaining character devices that don't allow unmapped I/O? > > > > -Alan > > > > I assume you mean disk-like devices? Probably mmcsd, flash/at45d, > flash/mx25l. > There are times that it's disabled administratively as well, but that may be on a per-I/O basis. vfs.zfs.vol.unmap_enabled: 1 vfs.unmapped_buf_allowed: 1 "Why do you ask?" is the next question... Warner