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[45.32.91.63]) by smtp.gmail.com with ESMTPSA id m1-20020a17090a7f8100b0021885b05660sm1473980pjl.24.2022.12.16.06.41.44 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Dec 2022 06:41:45 -0800 (PST) From: Zhenlei Huang X-Google-Original-From: Zhenlei Huang Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit List-Id: Discussion about FreeBSD jail(8) List-Archive: https://lists.freebsd.org/archives/freebsd-jail List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-jail@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.7\)) Subject: Is it possible to employ epoch to simplify managing prison lifecycle Message-Id: <9BD54A54-A809-4D3E-BCBA-639E6C61FE37@FreeBSD.org> Date: Fri, 16 Dec 2022 22:41:39 +0800 To: freebsd-jail@freebsd.org X-Mailer: Apple Mail (2.3608.120.23.2.7) X-Spamd-Result: default: False [-2.50 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; MID_RHS_MATCH_TO(1.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; MV_CASE(0.50)[]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20210112]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-jail@freebsd.org]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::62e:from]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_NONE(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; TAGGED_FROM(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; RCVD_TLS_LAST(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; MIME_TRACE(0.00)[0:+]; MLMMJ_DEST(0.00)[freebsd-jail@freebsd.org] X-Rspamd-Queue-Id: 4NYWyL5nT6z4PXD X-Spamd-Bar: -- X-ThisMailContainsUnwantedMimeParts: N Hi, While hacking `sys/kern/kern_jail.c` I got lost. There're lots of ref / unref and flags to prevent visit invalid prison while concurrent modification is possible and some refs looks weird. Is it possible to employ epoch(9) to simplify managing of prison lifecycle ? Best regards, Zhenlei