Date: Wed, 25 Jan 2012 20:54:09 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r230553 - head/sys/kern Message-ID: <201201252054.q0PKs9iF045075@svn.freebsd.org>
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Author: kib Date: Wed Jan 25 20:54:09 2012 New Revision: 230553 URL: http://svn.freebsd.org/changeset/base/230553 Log: When doing vflush(WRITECLOSE), clean vnode pages. Unmounts do vfs_msync() before calling VFS_UNMOUNT(), but there is still a race allowing a process to dirty pages after msync finished. Remounts rw->ro just left dirty pages in system. Reviewed by: alc, tegge (long time ago) Tested by: pho MFC after: 2 weeks Modified: head/sys/kern/vfs_subr.c Modified: head/sys/kern/vfs_subr.c ============================================================================== --- head/sys/kern/vfs_subr.c Wed Jan 25 20:48:20 2012 (r230552) +++ head/sys/kern/vfs_subr.c Wed Jan 25 20:54:09 2012 (r230553) @@ -2496,6 +2496,18 @@ loop: * vnodes open for writing. */ if (flags & WRITECLOSE) { + if (vp->v_object != NULL) { + VM_OBJECT_LOCK(vp->v_object); + vm_object_page_clean(vp->v_object, 0, 0, 0); + VM_OBJECT_UNLOCK(vp->v_object); + } + error = VOP_FSYNC(vp, MNT_WAIT, td); + if (error != 0) { + VOP_UNLOCK(vp, 0); + vdrop(vp); + MNT_VNODE_FOREACH_ABORT(mp, mvp); + return (error); + } error = VOP_GETATTR(vp, &vattr, td->td_ucred); VI_LOCK(vp);
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