From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f66.google.com ([209.85.215.66]:33660 "EHLO mail-lf0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753519AbdGNMqK (ORCPT ); Fri, 14 Jul 2017 08:46:10 -0400 Received: by mail-lf0-f66.google.com with SMTP id t72so8094661lff.0 for ; Fri, 14 Jul 2017 05:46:04 -0700 (PDT) From: Filippe LeMarchand To: Qu Wenruo Cc: Lu Fengqi , linux-btrfs@vger.kernel.org, Qu Wenruo Subject: Re: Btrfs check reports errors, filesystem seems fine Date: Fri, 14 Jul 2017 15:45:56 +0300 Message-ID: <5752015.1oXpMoOTQR@carbide> In-Reply-To: <78e9bf0d-c8e9-f735-ad30-ed76affd8e07@gmx.com> References: <2049018.boNrIqZ5uI@carbide> <15005101.YYELHnmqn7@carbide> <78e9bf0d-c8e9-f735-ad30-ed76affd8e07@gmx.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2053980.2J8qt3qbdV"; micalg="sha256"; protocol="application/pkcs7-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --nextPart2053980.2J8qt3qbdV Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Ok then, many thanks. In a letter from Friday, July 14, 2017 15:41:22 MSK user Qu Wenruo wrote: >=20 > On 2017=E5=B9=B407=E6=9C=8814=E6=97=A5 20:26, Filippe LeMarchand wrote: > > So, my options are > > a) Delete and re-create sobvolume > > b) Try btrfs check --repair --mode original (if original mode is defaul= t, it already didn't help) >=20 > Then --repair doesn't help now. >=20 > > c) Do nothing and wait for further update >=20 > Further update plan includes: > c) Update btrfs check --repair to handle your case. > This will take some time for us to test and other guys to review. >=20 > d) Create a special purposed btrfs-corrupt-block patch for your image. > This will fix your fs, but only for your fs. > Not a generic solution, but at least it should work. >=20 > For now, it's recommend to backup important data, in case both c) and d)= =20 > fail. >=20 > Thanks, > Qu > > ? > >=20 > > In a letter from Friday, July 14, 2017 15:11:05 MSK user Qu Wenruo wrot= e: > >> > >> On 2017=E5=B9=B407=E6=9C=8814=E6=97=A5 20:04, Filippe LeMarchand wrote: > >>>> Currently possible solution may be deleting the whole subvolume. > >>> Can btrfs send (to external drive) and then btrfs receive back fix it= ? Or should I use simple cp/rsync? > >> > >> You could try if you have backup. > >> > >> Personally speaking, I'm not sure if it will work or make things worse. > >> Such hash and name mismatch is really rare, I don't know how kernel se= nd > >> will handle it. > >> > >>> =20 > >>>> If you have full backup, then you could try it. > >>> It is my root subvolume (sensitive data is on other ones), thus it is= expendable. Can btrfs check --repair damage other subvolumes? > >> > >> Unfortunately, it may corrupt other subvolumes. > >> But from your fsck output, the possibility of corruption is not that > >> high AFAIK. > >> > >> I recommend to backup other good subvolumes/snapshots using send and > >> receive just in case. > >> > >>> > >>>> Any idea about the reproducer? Or just random memory corruption? > >>> No idea why and no idea when. This partition is about year and a half= old, and I did btrfs check for the first time just about a month ago. > >>> Also I ran memtest recently and it didn't find any errors. > >> > >> Well, that's common. > >> I'll focus on checking your dump result to make a special purposed > >> btrfs-corrupt-block to fix your situation if no other method works for= you. > >> > >> Thanks, > >> Qu > >> > >>> > >>> In a letter from Friday, July 14, 2017 14:28:58 MSK user Qu Wenruo wr= ote: > >>>> > >>>> On 2017=E5=B9=B407=E6=9C=8814=E6=97=A5 18:12, Filippe LeMarchand wro= te: > >>>>> First "rm" on deprecated.txt worked, but file is still there. Neith= er the file, nor its parent directory cannot be deleted: > >>>>> > >>>>> $ sudo rm /usr/share/doc/packages/util-linux/deprecated.txt > >>>>> rm: cannot remove '/usr/share/doc/packages/util-linux/deprecated.tx= t': No such file or directory > >>>>> > >>>>> $ sudo rm -rf /usr/share/doc/packages/util-linux/ > >>>>> rm: cannot remove '/usr/share/doc/packages/util-linux/': Directory = not empty > >>>>> > >>>>> $ sudo ls -l /usr/share/doc/packages/util-linux/ > >>>>> ls: cannot access '/usr/share/doc/packages/util-linux/deprecated.tx= t': No such file or directory > >>>>> total 0 > >>>>> -????????? ? ? ? ? ? deprecated.txt > >>>> > >>>> Similar behavior is also detected using manually crafted image in our > >>>> environment. > >>>> > >>>> Su Yue have sent patches to enhance error detection and test case for > >>>> it, but repairing is not supported. > >>>> > >>>>> > >>>>> Reinstall of util-linux package gives me two of that file (and also= two files present on previous snapshot): > >>>>> > >>>>> $ ls -l /usr/share/doc/packages/util-linux/ > >>>>> total 104 > >>>>> -rw-r--r-- 1 root root 18092 Jul 20 2016 COPYING > >>>>> -rw-r--r-- 1 root root 1391 Jul 20 2016 COPYING.BSD-3 > >>>>> -rw-r--r-- 1 root root 26530 Jul 20 2016 COPYING.LGPLv2.1 > >>>>> -rw-r--r-- 1 root root 1824 Jul 20 2016 COPYING.UCB > >>>>> -rw-r--r-- 1 root root 555 Jul 20 2016 README.licensing > >>>>> -rw-r--r-- 1 root root 3257 Jul 20 2016 blkid.txt > >>>>> -rw-r--r-- 1 root root 2264 Jul 20 2016 cal.txt > >>>>> -rw-r--r-- 1 root root 1913 Jul 20 2016 col.txt > >>>>> -rw-r--r-- 1 root root 2825 May 2 13:17 deprecated.txt > >>>>> -rw-r--r-- 1 root root 2825 May 2 13:17 deprecated.txt > >>>>> -rw-r--r-- 1 root root 992 Jul 20 2016 getopt.txt > >>>>> -rw-r--r-- 1 root root 2437 Nov 2 2016 howto-debug.txt > >>>>> -rw-r--r-- 1 root root 148 Jul 20 2016 hwclock.txt > >>>>> -rw-r--r-- 1 root root 2617 Jul 20 2016 modems-with-agetty.txt > >>>>> -rw-r--r-- 1 root root 522 Jul 20 2016 mount.txt > >>>>> -rw-r--r-- 1 root root 448 Jul 20 2016 pg.txt > >>>>> > >>>>> So, is this situation actually dangerous? And what can I do to gath= er more information for you? > >>>> > >>>> The situation won't be worse. I'd recommend not to take any snapshot= of > >>>> those subvolumes (4546 and 5134) to limit the corruption to those > >>>> subvolumes. > >>>> > >>>> However there is also no easy way to fix it yet. > >>>> > >>>> Currently possible solution may be deleting the whole subvolume. > >>>> If no further error happens, it may be fixed. > >>>> > >>>> IIRC btrfs check --repair in original mode has > >>>> DIR_ITEM/DIR_INDEX/INODE_REF repair function, but I'm not sure if it= can > >>>> handle it well. > >>>> Btrfs check --repair *MAY* fix it, or it may make things worse. > >>>> If you have full backup, then you could try it. > >>>> Otherwise, don't try it at all. > >>>> > >>>> Other solution includes a specific repair program just for your case. > >>>> We can modify btrfs-corrupt-block to just delete the corrupted DIR_I= TEM > >>>> (".sxt" one) and related DIR_INDEX/INODE_REF. > >>>> But I'll only choose this if you really need to fix it as soon as po= ssible. > >>>> > >>>> At least we have solution for it. > >>>> I'm more concerned about how this happened. > >>>> > >>>> Any idea about the reproducer? Or just random memory corruption? > >>>> > >>>> Thanks, > >>>> Qu > >>>>> > >>>>> In a letter from Friday, July 14, 2017 9:11:06 MSK user Qu Wenruo w= rote: > >>>>>> Thanks for your dump. > >>>>>> > >>>>>> We're clear what is the direct cause of the problem. > >>>>>> > >>>>>> It's one corrupted DIR_ITEM causing the problem. > >>>>>> And further more, original mode btrfs check can't detect it, and w= e will > >>>>>> fix it soon. > >>>>>> > >>>>>> The corrupted DIR_ITEM is as the following: > >>>>>> item 72 key (79177 DIR_ITEM 54846528) itemoff 12380 itemsize 88 > >>>>>> location key (4222342 INODE_ITEM 0) type FILE > >>>>>> transid 170929 data_len 0 name_len 14 > >>>>>> name: deprecated.sxt > >>>>>> location key (13590433 INODE_ITEM 0) type FILE > >>>>>> transid 796448 data_len 0 name_len 14 > >>>>>> name: deprecated.txt > >>>>>> > >>>>>> For dir inode 79177, it has 2 child inodes, with name "deprecated.= txt" > >>>>>> (ino=3D4222342) and "deprecated.sxt" (ino=3D13590433) > >>>>>> > >>>>>> But something goes wrong here: > >>>>>> > >>>>>> 1) Hash of "deprecated.sxt" doesn't match 54846528 > >>>>>> > >>>>>> 2) Inode backref of inode 4222342 thinks its filename is "deprecat= ed.txt" > >>>>>> Also captured by dump: > >>>>>> item 40 key (4222342 INODE_REF 79177) itemoff 7189 itemsize 24 > >>>>>> inode ref index 417 namelen 14 name: deprecated.txt > >>>>>> > >>>>>> 3) DIR_INDEX also shows that filename for inode 4222342 should be > >>>>>> "deprecated.txt" > >>>>>> item 87 key (79177 DIR_INDEX 417) itemoff 11757 itemsize 44 > >>>>>> location key (4222342 INODE_ITEM 0) type FILE > >>>>>> transid 170929 data_len 0 name_len 14 > >>>>>> name: deprecated.txt > >>>>>> > >>>>>> So generic speaking, it's DIR_ITEM wrong and causing the problem. > >>>>>> > >>>>>> But the root reason is still unknown. > >>>>>> > >>>>>> What I can see is, the corrupted DIR_ITEM points to an very old in= ode, > >>>>>> its mtime is back to 2016-09-07. > >>>>>> While the good DIR_ITEM points to newer inode, whose mtime is just > >>>>>> 2017-05-02. > >>>>>> > >>>>>> But more weird, there should not be two child inodes with the same > >>>>>> filename ("depercated.txt", I assume the sxt one is caused by a me= mory > >>>>>> bit corruption). > >>>>>> > >>>>>> So, any details on the operation with util-linux/deprecated.txt wi= ll > >>>>>> help us to locate the root cause in kernel. > >>>>>> > >>>>>> Thanks, > >>>>>> Qu > >>>>>> > >>>>>> > >>>>>> On 2017=E5=B9=B407=E6=9C=8812=E6=97=A5 21:11, Filippe LeMarchand w= rote: > >>>>>>> Done, files added to same GDrive folder with corresponding names. > >>>>>>> If it matters, subvol 4546 is my root filesystem (r/w snapshot cr= eated with snapper rollback), and 5134 is its snapshot. > >>>>>>> > >>>>>>> In a letter dated Wednesday, July 12, 2017 15:44:52 MSK user Qu W= enruo wrote: > >>>>>>>> > >>>>>>>> On 2017=E5=B9=B407=E6=9C=8812=E6=97=A5 19:12, Filippe LeMarchand= wrote: > >>>>>>>>>> Maybe something wrong in grep happened which skip "(79177" ? > >>>>>>>>> Yes, my bad. Now I used grep -E "\(79177| 79177" pattern, file = on GDrive updated. > >>>>>>>> > >>>>>>>> It looks much better, thanks. > >>>>>>>> > >>>>>>>>> > >>>>>>>>> And btrfs check --mode=3Dlowmem gives this: > >>>>>>>>> > >>>>>>>>> checking extents > >>>>>>>>> ERROR: extent[1609877700608, 94208] referencer count mismatch (= root: 260, owner: 61720, offset: 6742016) wanted: 2, have: 5 > >>>>>>>>> ERROR: extent[1630301675520, 39583744] referencer count mismatc= h (root: 260, owner: 5847554, offset: 0) wanted: 36, have: 114 > >>>>>>>>> ERROR: extent[1658646986752, 10551296] referencer count mismatc= h (root: 274, owner: 283675, offset: 0) wanted: 2, have: 5 > >>>>>>>>> ERROR: extent[1672239132672, 84381696] referencer count mismatc= h (root: 274, owner: 2521382, offset: 0) wanted: 21, have: 25 > >>>>>>>>> ERROR: errors found in extent allocation tree or chunk allocati= on > >>>>>>>> > >>>>>>>> Looks much like an exposed lowmem mode bug. > >>>>>>>> Feel free to ignore these error from extent tree, they are just = false > >>>>>>>> alerts. > >>>>>>>> > >>>>>>>>> checking free space cache > >>>>>>>>> checking fs roots > >>>>>>>>> ERROR: root 4546 DIR_ITEM[79177 54846528] relative INODE_REF mi= ssing namelen 14 filename deprecated.sxt filetype 1 > >>>>>>>> > >>>>>>>> The error report is much better than original mode, and that's w= hat I need. > >>>>>>>> > >>>>>>>> Now I can wipe out all other noise as we know exactly which tree= and > >>>>>>>> which DIR_ITEM/INODE_REF is causing the problem. > >>>>>>>> > >>>>>>>> Would you please update the dump result with "-t 4546" passed to > >>>>>>>> btrfs-debug-tree like: > >>>>>>>> > >>>>>>>> # btrfs-debug-tree -t 4546 | grep 79177 > >>>>>>>> > >>>>>>>> Only "-t 4546" is added, to only dump the result of subvolume 45= 46. > >>>>>>>> As always, all 3 grep results (2 "deprecated" and one 79177) nee= d to be > >>>>>>>> updated. > >>>>>>>> > >>>>>>>> And it seems that my previous assumption is still right for this= case. > >>>>>>>> If it's caused by kernel, your dump would definitely help us to = locate > >>>>>>>> the problem. > >>>>>>>> > >>>>>>>>> ERROR: root 4546 INODE REF[4222342 79177] and DIR_ITEM[79177 54= 846528] mismatch namelen 14 filename deprecated.txt filetype 1 > >>>>>>>>> ERROR: root 5134 DIR_ITEM[79177 54846528] relative INODE_REF mi= ssing namelen 14 filename deprecated.sxt filetype 1 > >>>>>>>> > >>>>>>>> Also for root 5134 please. > >>>>>>>> > >>>>>>>> Thanks, > >>>>>>>> Qu > >>>>>>>> > >>>>>>>>> ERROR: errors found in fs roots > >>>>>>>>> Checking filesystem on /dev/sda2 > >>>>>>>>> UUID: 12c84aa3-ce65-4390-807e-a72cc8a7445e > >>>>>>>>> found 153429872640 bytes used, error(s) found > >>>>>>>>> total csum bytes: 121991672 > >>>>>>>>> total tree bytes: 1940160512 > >>>>>>>>> total fs tree bytes: 1683767296 > >>>>>>>>> total extent tree bytes: 103841792 > >>>>>>>>> btree space waste bytes: 310722480 > >>>>>>>>> file data blocks allocated: 842455031808 > >>>>>>>>> referenced 159286636544 > >>>>>>>>> > >>>>>>>>> In a letter from Wednesday, July 12, 2017 10:15:18 MSK user Qu = Wenruo wrote: > >>>>>>>>>> Sorry for the late reply. > >>>>>>>>>> > >>>>>>>>>> After investigating the dumps, I found the output is quite str= ange. > >>>>>>>>>> > >>>>>>>>>> 1) Mismatching output. > >>>>>>>>>> In "btrfs-debug-tree-grep-79177.txt" I found only 79177 as off= set for > >>>>>>>>>> INODE_REF is here, while 79177 as objectid for DIR_ITEM/DIR_IN= DEX is not > >>>>>>>>>> here at all. > >>>>>>>>>> > >>>>>>>>>> While in "btrfs-debug-tree-grep-deprecated-txt.txt" there is e= pected > >>>>>>>>>> 79177 DIR_ITEM/DIR_INDEX. > >>>>>>>>>> > >>>>>>>>>> Maybe something wrong in grep happened which skip "(79177" ? > >>>>>>>>>> > >>>>>>>>>> 2) Mismatched hash > >>>>>>>>>> The main problem I found is that, for key (79177 DIR_ITEM 5484= 6528), the > >>>>>>>>>> number 54846528 is the hash(crc32c) of filename, and it contai= ns 2 > >>>>>>>>>> items, one for "deprecated.txt" and one for "deprecated.sxt". > >>>>>>>>>> > >>>>>>>>>> But we found that 54846528 only matches the hash for "deprecat= ed.txt", > >>>>>>>>>> not "deprecated.sxt". > >>>>>>>>>> > >>>>>>>>>> I think that's the main problem. > >>>>>>>>>> > >>>>>>>>>> BTW, would you please try "btrfs check --mode=3Dlowmem" to see= if lowmem > >>>>>>>>>> mode reports similar (well, output may differ) error? > >>>>>>>>>> > >>>>>>>>>> If lowmem mode also reports error on such DIR_ITEM, I'm pretty= sure > >>>>>>>>>> that's the problem. > >>>>>>>>>> > >>>>>>>>>> However it may take some time before we can fix it in repair m= ode. > >>>>>>>>>> > >>>>>>>>>> Thanks, > >>>>>>>>>> Qu > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> =E5=9C=A8 2017=E5=B9=B407=E6=9C=8804=E6=97=A5 21:24, Filippe L= eMarchand =E5=86=99=E9=81=93: > >>>>>>>>>>> Sure, here it is: > >>>>>>>>>>> https://drive.google.com/drive/folders/0B1ax9Am81gx9YjJBVVA0L= XRHeGc > >>>>>>>>>>> > >>>>>>>>>>> In a letter dated Tuesday, July 4, 2017 16:16:36 MSK user Lu = =46engqi wrote: > >>>>>>>>>>>> On Mon, Jul 03, 2017 at 08:34:52AM +0800, Qu Wenruo wrote: > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> At 07/01/2017 07:59 PM, Filippe LeMarchand wrote: > >>>>>>>>>>>>>> Hello everyone. > >>>>>>>>>>>>>> > >>>>>>>>>>>>>> I have an btrfs root partition on Intel 530 ssd, which mou= nts without errors and seem to work fine, > >>>>>>>>>>>>>> but `btrfs check` gives me foloowing output (and --repair = doesn't remove errors): > >>>>>>>>>>>>>> > >>>>>>>>>>>>>> enabling repair mode > >>>>>>>>>>>>>> Checking filesystem on /dev/sda2 > >>>>>>>>>>>>>> UUID: 12c84aa3-ce65-4390-807e-a72cc8a7445e > >>>>>>>>>>>>>> checking extents > >>>>>>>>>>>>>> Fixed 0 roots. > >>>>>>>>>>>>>> checking free space cache > >>>>>>>>>>>>>> cache and super generation don't match, space cache will b= e invalidated > >>>>>>>>>>>>>> checking fs roots > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>> > >>>>>>>>>>>>> This means that in dir whose inode number is 79177, it has = a child inode > >>>>>>>>>>>>> pointer pointing to depercated.sxt. > >>>>>>>>>>>>> > >>>>>>>>>>>>> But it doesn't have dir index and corresponding inode ref, = which is breaking > >>>>>>>>>>>>> the cross reference rule of btrfs. > >>>>>>>>>>>>> > >>>>>>>>>>>>> Would you please run the following command to dump needed i= nfo for us to > >>>>>>>>>>>>> debug? > >>>>>>>>>>>>> > >>>>>>>>>>>>> # btrfs-debug-tree /dev/sda2 | grep 79177 -C 10 > >>>>>>>>>>>>> > >>>>>>>>>>>>> and > >>>>>>>>>>>>> > >>>>>>>>>>>>> # btrfs-debug-tree /dev/sda2 | grep deprecated.sxt -C 10 > >>>>>>>>>>>>> > >>>>>>>>>>>>> and > >>>>>>>>>>>>> > >>>>>>>>>>>>> # btrfs-debug-tree /dev/sda2 | grep deprecated.txt -C 10 > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> Considering the output has both .txt and .sxt, I think that= 's the problem. > >>>>>>>>>>>>> But such bit-flip should be detected by tree block csum. > >>>>>>>>>>>>> I'm not sure what's wrong with it. > >>>>>>>>>>>>> > >>>>>>>>>>>>> Thanks, > >>>>>>>>>>>>> Qu > >>>>>>>>>>>>> > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> unresolved ref dir 79177 index 0 namelen 14 name deprecat= ed.sxt filetype 1 errors 6, no dir index, no inode ref > >>>>>>>>>>>>>> unresolved ref dir 79177 index 417 namelen 14 name deprec= ated.txt filetype 1 errors 1, no dir item > >>>>>>>>>>>>>> checking csums > >>>>>>>>>>>>>> checking root refs > >>>>>>>>>>>>>> found 23421812736 bytes used err is 0 > >>>>>>>>>>>>>> total csum bytes: 21531608 > >>>>>>>>>>>>>> total tree bytes: 776650752 > >>>>>>>>>>>>>> total fs tree bytes: 711278592 > >>>>>>>>>>>>>> total extent tree bytes: 36798464 > >>>>>>>>>>>>>> btree space waste bytes: 116002036 > >>>>>>>>>>>>>> file data blocks allocated: 850546470912 > >>>>>>>>>>>>>> referenced 27611987968 > >>>>>>>>>>>>>> > >>>>>>>>>>>>>> Is it dangerous and what should I do about it? > >>>>>>>>>>>>>> > >>>>>>>>>>>>>> I also tried --clear-space-cache, but it just removes the = line about space cache. > >>>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> > >>>>>>>>>>>>> -- > >>>>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe l= inux-btrfs" in > >>>>>>>>>>>>> the body of a message to majordomo@vger.kernel.org > >>>>>>>>>>>>> More majordomo info at http://vger.kernel.org/majordomo-in= fo.html > >>>>>>>>>>>> > >>>>>>>>>>>> I'm afraid that your mail may be rejected because the attach= ment size > >>>>>>>>>>>> exceeds the allowable limit(100kB) of btrfs mailing list. Co= uld you > >>>>>>>>>>>> share the attachment by google drive? > >>>>>>>>>>>> > >>>>>>>>>>>> Lastly, while Qu's timing is too tight, I will assist you on= this issue. > >>>>>>>>>>>> >=20 --nextPart2053980.2J8qt3qbdV Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEPww ggXYMIIDwKADAgECAhBMqvnK22Nv4B/3TthbA4adMA0GCSqGSIb3DQEBDAUAMIGFMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDErMCkGA1UEAxMiQ09NT0RPIFJTQSBDZXJ0aWZpY2F0aW9u IEF1dGhvcml0eTAeFw0xMDAxMTkwMDAwMDBaFw0zODAxMTgyMzU5NTlaMIGFMQswCQYDVQQGEwJH QjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQK ExFDT01PRE8gQ0EgTGltaXRlZDErMCkGA1UEAxMiQ09NT0RPIFJTQSBDZXJ0aWZpY2F0aW9uIEF1 dGhvcml0eTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAJHoVJLSClaxrA0k3cXPRGd0 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