From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from digeo-nav01.digeo.com (digeo-nav01.digeo.com [192.168.1.233]) by packet.digeo.com (8.9.3+Sun/8.9.3) with SMTP id SAA01106 for ; Sat, 28 Sep 2002 18:32:01 -0700 (PDT) Message-ID: <3D96580D.A0F803BC@digeo.com> Date: Sat, 28 Sep 2002 18:31:57 -0700 From: Andrew Morton MIME-Version: 1.0 Subject: Re: suspect list_empty( {NULL, NULL} ) References: <20020928205836.C13817@bitchcake.off.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Zach Brown Cc: lkml , linux-mm@kvack.org List-ID: Zach Brown wrote: > > A cute list_head debugging patch seems to have found strange list_entry > use in vmscan.c in stock 2.5.39. > > page_mapping_inuse: > > if (!list_empty(&mapping->i_mmap) || !list_empty(&mapping->i_mmap_shared)) > > ... > (gdb) print *mapping > $22 = {host = 0xc03b6e00 That's swapper_space. --- 2.5.39/mm/swap_state.c~swapper_space-state Sat Sep 28 18:30:45 2002 +++ 2.5.39-akpm/mm/swap_state.c Sat Sep 28 18:31:26 2002 @@ -43,6 +43,8 @@ struct address_space swapper_space = { .a_ops = &swap_aops, .backing_dev_info = &swap_backing_dev_info, .i_shared_lock = SPIN_LOCK_UNLOCKED, + .i_mmap = LIST_HEAD_INIT(swapper_space.i_mmap), + .i_mmap_shared = LIST_HEAD_INIT(swapper_space.i_mmap_shared), .private_lock = SPIN_LOCK_UNLOCKED, .private_list = LIST_HEAD_INIT(swapper_space.private_list), }; . -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/