From owner-svn-src-stable-11@freebsd.org Sat Aug 31 08:52:58 2019 Return-Path: Delivered-To: svn-src-stable-11@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 A4E04CB14D; Sat, 31 Aug 2019 08:52:58 +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) server-signature RSA-PSS (4096 bits) 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 46L9963lLGz4GSY; Sat, 31 Aug 2019 08:52:58 +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 6238CE6D4; Sat, 31 Aug 2019 08:52:58 +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 x7V8qwkO038064; Sat, 31 Aug 2019 08:52:58 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x7V8qwts038063; Sat, 31 Aug 2019 08:52:58 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201908310852.x7V8qwts038063@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sat, 31 Aug 2019 08:52:58 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r351640 - stable/11/sys/vm X-SVN-Group: stable-11 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/11/sys/vm X-SVN-Commit-Revision: 351640 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-11@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 11-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 31 Aug 2019 08:52:58 -0000 Author: kib Date: Sat Aug 31 08:52:57 2019 New Revision: 351640 URL: https://svnweb.freebsd.org/changeset/base/351640 Log: MFC r351453: Make stack grow use the same gap as stack create. Modified: stable/11/sys/vm/vm_map.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/vm/vm_map.c ============================================================================== --- stable/11/sys/vm/vm_map.c Sat Aug 31 08:40:41 2019 (r351639) +++ stable/11/sys/vm/vm_map.c Sat Aug 31 08:52:57 2019 (r351640) @@ -3686,8 +3686,20 @@ vm_map_stack_locked(vm_map_t map, vm_offset_t addrbos, rv = vm_map_insert(map, NULL, 0, gap_bot, gap_top, VM_PROT_NONE, VM_PROT_NONE, MAP_CREATE_GUARD | (orient == MAP_STACK_GROWS_DOWN ? MAP_CREATE_STACK_GAP_DN : MAP_CREATE_STACK_GAP_UP)); - if (rv != KERN_SUCCESS) + if (rv == KERN_SUCCESS) { + /* + * Gap can never successfully handle a fault, so + * read-ahead logic is never used for it. Re-use + * next_read of the gap entry to store + * stack_guard_page for vm_map_growstack(). + */ + if (orient == MAP_STACK_GROWS_DOWN) + new_entry->prev->next_read = sgp; + else + new_entry->next->next_read = sgp; + } else { (void)vm_map_delete(map, bot, top); + } return (rv); } @@ -3728,7 +3740,6 @@ vm_map_growstack(vm_map_t map, vm_offset_t addr, vm_ma MPASS(!map->system_map); - guard = stack_guard_page * PAGE_SIZE; lmemlim = lim_cur(curthread, RLIMIT_MEMLOCK); stacklim = lim_cur(curthread, RLIMIT_STACK); vmemlim = lim_cur(curthread, RLIMIT_VMEM); @@ -3755,6 +3766,7 @@ retry: } else { return (KERN_FAILURE); } + guard = gap_entry->next_read; max_grow = gap_entry->end - gap_entry->start; if (guard > max_grow) return (KERN_NO_SPACE);