From owner-svn-src-stable@freebsd.org Mon Feb 12 10:34:16 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B6FDEF0C4C4; Mon, 12 Feb 2018 10:34:16 +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 TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 68BD66C870; Mon, 12 Feb 2018 10:34:16 +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 6392E10C51; Mon, 12 Feb 2018 10:34:16 +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 w1CAYGYr056783; Mon, 12 Feb 2018 10:34:16 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w1CAYGlZ056782; Mon, 12 Feb 2018 10:34:16 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201802121034.w1CAYGlZ056782@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Mon, 12 Feb 2018 10:34:16 +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: r329156 - 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: 329156 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@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Feb 2018 10:34:16 -0000 Author: kib Date: Mon Feb 12 10:34:15 2018 New Revision: 329156 URL: https://svnweb.freebsd.org/changeset/base/329156 Log: MFC r328880: On munlock(), unwire correct page. Modified: stable/11/sys/vm/vm_object.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/vm/vm_object.c ============================================================================== --- stable/11/sys/vm/vm_object.c Mon Feb 12 06:52:49 2018 (r329155) +++ stable/11/sys/vm/vm_object.c Mon Feb 12 10:34:15 2018 (r329156) @@ -2268,7 +2268,7 @@ void vm_object_unwire(vm_object_t object, vm_ooffset_t offset, vm_size_t length, uint8_t queue) { - vm_object_t tobject; + vm_object_t tobject, t1object; vm_page_t m, tm; vm_pindex_t end_pindex, pindex, tpindex; int depth, locked_depth; @@ -2282,6 +2282,7 @@ vm_object_unwire(vm_object_t object, vm_ooffset_t offs return; pindex = OFF_TO_IDX(offset); end_pindex = pindex + atop(length); +again: locked_depth = 1; VM_OBJECT_RLOCK(object); m = vm_page_find_least(object, pindex); @@ -2315,16 +2316,26 @@ vm_object_unwire(vm_object_t object, vm_ooffset_t offs m = TAILQ_NEXT(m, listq); } vm_page_lock(tm); + if (vm_page_xbusied(tm)) { + for (tobject = object; locked_depth >= 1; + locked_depth--) { + t1object = tobject->backing_object; + VM_OBJECT_RUNLOCK(tobject); + tobject = t1object; + } + vm_page_busy_sleep(tm, "unwbo", true); + goto again; + } vm_page_unwire(tm, queue); vm_page_unlock(tm); next_page: pindex++; } /* Release the accumulated object locks. */ - for (depth = 0; depth < locked_depth; depth++) { - tobject = object->backing_object; - VM_OBJECT_RUNLOCK(object); - object = tobject; + for (tobject = object; locked_depth >= 1; locked_depth--) { + t1object = tobject->backing_object; + VM_OBJECT_RUNLOCK(tobject); + tobject = t1object; } }