diff --git a/sys/fs/puffs/puffs_vnops.c b/sys/fs/puffs/puffs_vnops.c index ed9b738f221f..46cca103fe76 100644 --- a/sys/fs/puffs/puffs_vnops.c +++ b/sys/fs/puffs/puffs_vnops.c @@ -1,4 +1,4 @@ -/* $NetBSD: puffs_vnops.c,v 1.198 2014/11/04 09:14:42 manu Exp $ */ +/* $NetBSD: puffs_vnops.c,v 1.199 2015/01/13 16:39:51 manu Exp $ */ /* * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. @@ -30,7 +30,7 @@ */ #include -__KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.198 2014/11/04 09:14:42 manu Exp $"); +__KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.199 2015/01/13 16:39:51 manu Exp $"); #include #include @@ -2279,9 +2279,17 @@ puffs_vnop_read(void *v) if (uio->uio_offset < 0) return EFBIG; + /* + * On the case of reading empty files and (vp->v_size != 0) below: + * some filesystems (hint: FUSE and distributed filesystems) still + * expect to get the READ in order to update atime. Reading through + * the case filters empty files, therefore we prefer to bypass the + * cache here. + */ if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp) && - !(pn->pn_stat & PNODE_RDIRECT)) { + !(pn->pn_stat & PNODE_RDIRECT) && + (vp->v_size != 0)) { const int advice = IO_ADV_DECODE(ap->a_ioflag); while (uio->uio_resid > 0) {