From nobody Wed Oct 25 07:58:41 2023 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4SFhBr0QF4z4yB4Y for ; Wed, 25 Oct 2023 07:58:44 +0000 (UTC) (envelope-from saper@saper.info) Received: from q.saper.info (q.saper.info [IPv6:2605:2700:0:2:a800:ff:fec7:5c61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature ECDSA (P-384) client-digest SHA384) (Client CN "q.saper.info", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4SFhBq1Hrkz3C2c for ; Wed, 25 Oct 2023 07:58:43 +0000 (UTC) (envelope-from saper@saper.info) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=saper.info header.s=Sep2014 header.b=cru61i+r; spf=none (mx1.freebsd.org: domain of saper@saper.info has no SPF policy when checking 2605:2700:0:2:a800:ff:fec7:5c61) smtp.mailfrom=saper@saper.info; dmarc=none Received: from q.saper.info (localhost [127.0.0.1]) by q.saper.info (8.17.1/8.17.1) with ESMTPS id 39P7wfUx037036 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Wed, 25 Oct 2023 07:58:41 GMT (envelope-from saper@saper.info) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=saper.info; s=Sep2014; t=1698220721; bh=pWimXzmGtYn2SIp/JGIgiHyQ66c4uFtwKf0S5224QFs=; h=Date:From:To:Subject; b=cru61i+rG4+n97vMxbJu03C3nfLAjVVOhWjwhIztShOvWOfBMzWm/XJgdXNsX0LYg 7HunHVYikyxvT2Nz5YNY8Jm7aZfo2AlQ+1fRDLijjMYBhgso2/qWdbH58u1k5UVx/1 LG6Gc76yNEATKU9Cr58dto3YC+X2nphWxVAtybs8= Received: from localhost (saper@localhost) by q.saper.info (8.17.1/8.17.1/Submit) with ESMTP id 39P7wf3p037033 for ; Wed, 25 Oct 2023 07:58:41 GMT (envelope-from saper@saper.info) X-Authentication-Warning: q.saper.info: saper owned process doing -bs Date: Wed, 25 Oct 2023 07:58:41 +0000 From: Marcin Cieslak To: FreeBSD Current Subject: d_map_single - how should it work? Message-ID: <3639798o-57qp-8r14-n250-57520ssps48o@fncre.vasb> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="2201072851-802137771-1698220721=:3649" X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.40 / 15.00]; SIGNED_SMIME(-2.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; SUBJECT_ENDS_QUESTION(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.996]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; R_DKIM_ALLOW(-0.20)[saper.info:s=Sep2014]; DKIM_TRACE(0.00)[saper.info:+]; MLMMJ_DEST(0.00)[freebsd-current@FreeBSD.org]; FROM_EQ_ENVFROM(0.00)[]; TO_DN_ALL(0.00)[]; R_SPF_NA(0.00)[no SPF record]; MIME_TRACE(0.00)[0:+,1:+,2:~]; DMARC_NA(0.00)[saper.info]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:47066, ipnet:2605:2700::/32, country:US]; FROM_HAS_DN(0.00)[]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; TO_MATCH_ENVRCPT_ALL(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; HAS_ATTACHMENT(0.00)[]; HAS_XAW(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Queue-Id: 4SFhBq1Hrkz3C2c --2201072851-802137771-1698220721=:3649 Content-Type: text/plain; format=flowed; charset=US-ASCII Hello, is there any documentation for cdevsw methods? I am interested in knowing how d_map_single should be written. Most specifically, I want to know if the driver has a chance to track mmaped allocations on its own (as far as I can see there unmap(2) does not call any of the driver's methods). Marcin --2201072851-802137771-1698220721=:3649 Content-Type: application/pkcs7-signature; name=smime.p7s Content-Transfer-Encoding: BASE64 Content-Description: S/MIME Cryptographic Signature Content-Disposition: attachment; filename=smime.p7s MIIOdgYJKoZIhvcNAQcCoIIOZzCCDmMCAQExDzANBglghkgBZQMEAgEFADAL BgkqhkiG9w0BBwGgggq9MIIEvDCCA6SgAwIBAgIQeEqpEhjRpCYIUTzTZlVD ozANBgkqhkiG9w0BAQsFADBMMSAwHgYDVQQLExdHbG9iYWxTaWduIFJvb3Qg Q0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMKR2xvYmFs U2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yOTAzMTgwMDAwMDBaMFsxCzAJBgNV BAYTAkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhH bG9iYWxTaWduIEdDQyBSMyBQZXJzb25hbFNpZ24gMSBDQSAyMDIwMIIBIjAN BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvxvJBqEapaux2/z3J7fFslRO WjKVJ5rCMfWGsg17dmD7NSnG7Spoa8d3htXsls1IMxoO8PyouQajNQqYmlYo xinlqenMNv7CJyEKMOAtglBmD6C/QC7kT+dSx4HfSTs8xmv8veJOldMzF8S/ BEn/tD4w/Dvpg+oXOqDyOiHPTacRFK0QHoq5eEbBmVS8W0rwcaRotO9fGTA+ NjF0My7GLRNK0eMPGh2hcPZURQhXy7wRQ8XFIfEA6kaQHHN22ncnVtwqiTmA 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