Date: Fri, 27 Oct 2017 14:24:35 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r325038 - stable/11/sys/kern Message-ID: <201710271424.v9REOZ1M093787@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: markj Date: Fri Oct 27 14:24:35 2017 New Revision: 325038 URL: https://svnweb.freebsd.org/changeset/base/325038 Log: MFC r324804: Avoid the nbp lookup in the final loop iteration in flushbuflist(). Modified: stable/11/sys/kern/vfs_subr.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/vfs_subr.c ============================================================================== --- stable/11/sys/kern/vfs_subr.c Fri Oct 27 14:23:53 2017 (r325037) +++ stable/11/sys/kern/vfs_subr.c Fri Oct 27 14:24:35 2017 (r325038) @@ -1676,8 +1676,6 @@ flushbuflist(struct bufv *bufv, int flags, struct bufo ((flags & V_ALT) && (bp->b_xflags & BX_ALTDATA) == 0)) { continue; } - lblkno = 0; - xflags = 0; if (nbp != NULL) { lblkno = nbp->b_lblkno; xflags = nbp->b_xflags & (BX_VNDIRTY | BX_VNCLEAN); @@ -1712,6 +1710,8 @@ flushbuflist(struct bufv *bufv, int flags, struct bufo bp->b_flags &= ~B_ASYNC; brelse(bp); BO_LOCK(bo); + if (nbp == NULL) + break; nbp = gbincore(bo, lblkno); if (nbp == NULL || (nbp->b_xflags & (BX_VNDIRTY | BX_VNCLEAN)) != xflags)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201710271424.v9REOZ1M093787>