From owner-svn-src-all@freebsd.org Thu Oct 22 09:28:12 2020 Return-Path: Delivered-To: svn-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 590124435F1; Thu, 22 Oct 2020 09:28:12 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CH28r1dxHz4bx2; Thu, 22 Oct 2020 09:28:12 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 192FF148BD; Thu, 22 Oct 2020 09:28:12 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 09M9SBnM038829; Thu, 22 Oct 2020 09:28:11 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 09M9SBrC038828; Thu, 22 Oct 2020 09:28:11 GMT (envelope-from kib@FreeBSD.org) Message-Id: <202010220928.09M9SBrC038828@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Thu, 22 Oct 2020 09:28:11 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r366932 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 366932 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2020 09:28:12 -0000 Author: kib Date: Thu Oct 22 09:28:11 2020 New Revision: 366932 URL: https://svnweb.freebsd.org/changeset/base/366932 Log: sysv_sem: semusz depends on semume. Size of the per-process semaphore undo structure (semusz) depends on the number of the per-process undos. If kern.ipc.semume is adjusted, semusz must be adjusted as well, and it makes no sense to delegate adjustment to user. Make it automatic. Reported and tested by: Olef PR: 250361 Reviewed by: jhb, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D26826 Modified: head/sys/kern/sysv_sem.c Modified: head/sys/kern/sysv_sem.c ============================================================================== --- head/sys/kern/sysv_sem.c Thu Oct 22 09:17:56 2020 (r366931) +++ head/sys/kern/sysv_sem.c Thu Oct 22 09:28:11 2020 (r366932) @@ -187,13 +187,13 @@ struct sem_undo { #define SEM_ALIGN(bytes) roundup2(bytes, sizeof(long)) /* actual size of an undo structure */ -#define SEMUSZ SEM_ALIGN(offsetof(struct sem_undo, un_ent[SEMUME])) +#define SEMUSZ(x) SEM_ALIGN(offsetof(struct sem_undo, un_ent[(x)])) /* * Macro to find a particular sem_undo vector */ #define SEMU(ix) \ - ((struct sem_undo *)(((intptr_t)semu)+ix * seminfo.semusz)) + ((struct sem_undo *)(((intptr_t)semu) + (ix) * seminfo.semusz)) /* * semaphore info struct @@ -205,7 +205,7 @@ struct seminfo seminfo = { .semmsl = SEMMSL, /* max # of semaphores per id */ .semopm = SEMOPM, /* max # of operations per semop call */ .semume = SEMUME, /* max # of undo entries per process */ - .semusz = SEMUSZ, /* size in bytes of undo structure */ + .semusz = SEMUSZ(SEMUME), /* size in bytes of undo structure */ .semvmx = SEMVMX, /* semaphore maximum value */ .semaem = SEMAEM, /* adjust on exit max value */ }; @@ -222,7 +222,7 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, semopm, CTLFLAG_RDTUN, "Max operations per semop call"); SYSCTL_INT(_kern_ipc, OID_AUTO, semume, CTLFLAG_RDTUN, &seminfo.semume, 0, "Max undo entries per process"); -SYSCTL_INT(_kern_ipc, OID_AUTO, semusz, CTLFLAG_RDTUN, &seminfo.semusz, 0, +SYSCTL_INT(_kern_ipc, OID_AUTO, semusz, CTLFLAG_RD, &seminfo.semusz, 0, "Size in bytes of undo structure"); SYSCTL_INT(_kern_ipc, OID_AUTO, semvmx, CTLFLAG_RWTUN, &seminfo.semvmx, 0, "Semaphore maximum value"); @@ -284,6 +284,7 @@ seminit(void) M_WAITOK | M_ZERO); sema_mtx = malloc(sizeof(struct mtx) * seminfo.semmni, M_SEM, M_WAITOK | M_ZERO); + seminfo.semusz = SEMUSZ(seminfo.semume); semu = malloc(seminfo.semmnu * seminfo.semusz, M_SEM, M_WAITOK); for (i = 0; i < seminfo.semmni; i++) {