From owner-dev-commits-src-all@freebsd.org Fri Mar 12 13:21:53 2021 Return-Path: Delivered-To: dev-commits-src-all@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 8B057579210; Fri, 12 Mar 2021 13:21:53 +0000 (UTC) (envelope-from hps@selasky.org) Received: from mail.turbocat.net (turbocat.net [IPv6:2a01:4f8:c17:6c4b::2]) (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 did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4DxmgN5cxhz3qB5; Fri, 12 Mar 2021 13:21:52 +0000 (UTC) (envelope-from hps@selasky.org) Received: from hps2020.home.selasky.org (unknown [178.17.145.105]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by mail.turbocat.net (Postfix) with ESMTPSA id 491CF2602EC; Fri, 12 Mar 2021 14:21:45 +0100 (CET) Subject: Re: git: d1cbe7908986 - main - Allocating the LinuxKPI current structure from an interrupt thread must be done using the M_NOWAIT flag after 1ae20f7c70ea . From: Hans Petter Selasky To: Konstantin Belousov Cc: John Baldwin , src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org References: <202103100952.12A9qRKR040117@gitrepo.freebsd.org> <2b1739ab-000c-ca28-5a59-0a3e19ef4591@selasky.org> <5aaa5f2a-a67d-a495-7f56-a6b31c2494c7@FreeBSD.org> <3dcd63b0-fe90-2855-f349-2117ca4b6b26@selasky.org> <8fe37b5e-29a7-ffeb-fddb-3b31a6e79ab0@selasky.org> Message-ID: Date: Fri, 12 Mar 2021 14:21:27 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4DxmgN5cxhz3qB5 X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of hps@selasky.org designates 2a01:4f8:c17:6c4b::2 as permitted sender) smtp.mailfrom=hps@selasky.org X-Spamd-Result: default: False [-3.30 / 15.00]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+a:mail.turbocat.net]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[selasky.org]; ARC_NA(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; SPAMHAUS_ZRD(0.00)[2a01:4f8:c17:6c4b::2:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[2a01:4f8:c17:6c4b::2:from]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[dev-commits-src-all,dev-commits-src-main] X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Mar 2021 13:21:53 -0000 On 3/12/21 2:15 PM, Hans Petter Selasky wrote: > We could just pre-allocate these structures into a linked list, and > dequeue these for interrupt threads only. Every time a new interrupt is > allocated we allocate one more of these structures beforehand, and then > we use that structure back when the ITHREAD flags is set in the thread > structure, similar to what you are doing, except we don't use UMA zones. Let's move the discussion over to the differential revision I've created so that we can agree on a solution. --HPS