From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from magic.merlins.org ([209.81.13.136]:37560 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725969AbeGKEl4 (ORCPT ); Wed, 11 Jul 2018 00:41:56 -0400 Date: Tue, 10 Jul 2018 21:39:28 -0700 From: Marc MERLIN To: Su Yue Cc: Qu Wenruo , linux-btrfs@vger.kernel.org, Su Yue Message-ID: <20180711043928.itffs2kt52rbatsx@merlins.org> References: <20180710180915.onnxuak7vb7uywyn@merlins.org> <9afce26c-0a3f-3389-ba0f-597b26a8cd7e@cn.fujitsu.com> <20180711005852.prhnmohkzjplw54j@merlins.org> <9b612c36-f59c-b4c7-bb84-4a30c4a7d453@cn.fujitsu.com> <20180711014401.hic5vcp5h2tzgyxh@merlins.org> <9b0990aa-05aa-3e0e-463f-b4eb9894dc81@cn.fujitsu.com> <20180711033614.glhs2yt53napbrpr@merlins.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Subject: Re: btrfs check lowmem, take 2 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Wed, Jul 11, 2018 at 12:07:05PM +0800, Su Yue wrote: > > So, I went back to https://github.com/Damenly/btrfs-progs.git/tmp1 and > > I'm running it without the extra options you added with hardcoded stuff: > > gargamel:/var/local/src/btrfs-progs.sy-test# ./btrfsck --mode=lowmem --repair /dev/mapper/dshelf2 > > > This is okay. Let's wait to see the result. Sadly, it crashes quickly: Starting program: /var/local/src/btrfs-progs.sy-test/btrfs check --mode=lowmem --repair /dev/mapper/dshelf2 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". enabling repair mode WARNING: low-memory mode repair support is only partial Checking filesystem on /dev/mapper/dshelf2 UUID: 0f1a0c9f-4e54-4fa7-8736-fd50818ff73d checking extents Program received signal SIGSEGV, Segmentation fault. check_tree_block_backref (fs_info=fs_info@entry=0x555555825e10, root_id=root_id@entry=18446744073709551607, bytenr=bytenr@entry=655589376, level=level@entry=1) at check/mode-lowmem.c:3744 3744 if (btrfs_header_bytenr(node) != bytenr) { (gdb) bt #0 check_tree_block_backref (fs_info=fs_info@entry=0x555555825e10, root_id=root_id@entry=18446744073709551607, bytenr=bytenr@entry=655589376, level=level@entry=1) at check/mode-lowmem.c:3744 #1 0x00005555555cb1f9 in check_extent_item (fs_info=fs_info@entry=0x555555825e10, path=path@entry=0x7fffffffdc60) at check/mode-lowmem.c:4194 #2 0x00005555555d06e9 in check_leaf_items (account_bytes=1, nrefs=0x7fffffffdb80, path=0x7fffffffdc60, root=0x5555558262f0) at check/mode-lowmem.c:4654 #3 walk_down_tree (check_all=1, nrefs=0x7fffffffdb80, level=, path=0x7fffffffdc60, root=0x5555558262f0) at check/mode-lowmem.c:4790 #4 check_btrfs_root (root=root@entry=0x5555558262f0, check_all=check_all@entry=1) at check/mode-lowmem.c:5114 #5 0x00005555555d144f in check_chunks_and_extents_lowmem (fs_info=fs_info@entry=0x555555825e10) at check/mode-lowmem.c:5475 #6 0x00005555555b44b1 in do_check_chunks_and_extents (fs_info=0x555555825e10) at check/main.c:8369 #7 cmd_check (argc=, argv=) at check/main.c:9899 #8 0x0000555555567510 in main (argc=4, argv=0x7fffffffe390) at btrfs.c:302 Would you like anything off gdb? (feel free to Email me directly or point me to an online chat platform you have access to) Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ | PGP 7F55D5F27AAF9D08