Displaying 20 results from an estimated 30000 matches similar to: "How to get trace during crash?"
2010 Oct 11
4
Horrible btrfs performance on cold cache
Hi,
I use btrfs on most of my volumes on my laptop, and I''ve always felt
booting was very slow, but definitely sure is slow, is starting up
Google Chrome:
encrypted ext4: ~20s
btrfs: ~2:11s
I have tried different things to find out exactly what is the issue,
but haven''t quite found it yet.
Here''s some stuff I got from latencytop, not sure if would be helpful:
2012 Feb 13
23
Set nodatacow per file?
Hello,
is it possible to set nodatacow on a per-file basis? I couldn''t find
anything.
If not, wouldn''t that be a great feature to get around the performance
issues with VM and database storage? Of course cloning should still
cause COW.
Thanks,
Ralf-Peter
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2011 Oct 08
5
defrag makes fragmentation worse
Kernel 3.1-rc8
btrfs-progs-0.19
mount options: noatime,autodefrag (space_cache is enabled)
There are snapshots present on the filesystem.
When I do a btrfs fi defrag on a file, the file becomes much more
fragmented. The end result can be a file with 20k times more fragments
than before. Initially I thought the extents were just smaller but
were next to each other, so I checked with both
2013 Mar 26
3
Kernel BUG on corrupted space cache under 3.7 and 3.8
Dear list members,
Yesterday I was about to restart my computer and that''s why I closed every
opened applications: three Eclipse instances, two other Java applications, 2
web browsers etc. It involved a lot of IO operations and before everything
could settle down my system became unresponsive.
I mean X & co. worked fine, but anything related to IO (opening a new screen, a
new
2009 Oct 05
2
system hang with btrfs master
I''m using btrfs on two devices here, /usr on sda3 and /home on sdb (dm-crypt
device on the whole disk). With btrfs-master the whole system hangs when
accessing /home. The system hangs when I''m logging in into my account with KDE
and is easily reproducible with dbench. On /usr the hangs appeared also but
not as often as on the /home-device. I''ve tested on a third
2011 Jan 18
6
BUG while writing to USB btrfs filesystem
While untar''ing an image to an sd card via a reader, I got the
following bug. The system also has a btrfs root, and a whole swath of
processes went into uninterruptable sleep. I was able to poke around
via ssh and sysrq, and already had netconsole set up to capture the
bug.
Root fs is on /dev/sdi1, and /dev/sdj2 is the card reader which was
the target of the untar.
[29571.448889] sd
2012 Feb 09
7
Freeing space over reboot question
Glück Auf!
I use now kernel 3.2. The filesystem was originally created under 2.6.39 on 1 whole hdd, mounted with "noatime,nodiratime,inode_cache". I use it for backups: rsync the whole system to a subvolume, snapshot it and then delete some tempfiles in the snapshot, which are 90% of the full-backup, all once a day. In figures: on this 1 TB hdd is the full-backup with around 600 GiB and
2012 Jun 26
8
btrfs volume suddenly becomes read-only
I was using my computer normally when suddenly my btrfs volume became read-only.
This is on Chris'' for-linus branch (latest commit cb77fcd88)
Here''s the relevant excerpt from dmesg
[ 50.877500] r8169 0000:01:00.0: eth1: link up
[ 50.880296] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[ 60.959215] eth1: no IPv6 routers present
[ 1904.463247] atkbd serio0: Unknown key
2011 Aug 09
17
Re: Applications using fsync cause hangs for several seconds every few minutes
On 06/21/2011 01:15 PM, Jan Stilow wrote:
> Hello,
>
> Nirbheek Chauhan <nirbheek <at> gentoo.org> writes:
>> [...]
>>
>> Every few minutes, (I guess) when applications do fsync (firefox,
>> xchat, vim, etc), all applications that use fsync() hang for several
>> seconds, and applications that use general IO suffer extreme
>> slowdowns.
2013 Feb 13
1
[PATCH] Btrfs: fix crash in log replay with qgroups enabled
When replaying a log tree with qgroups enabled, tree_mod_log_rewind does a
sanity-check of the number of items against the maximum possible number.
It calculates that number with the nodesize of fs_root. Unfortunately
fs_root is not yet set at this stage. So instead use the nodesize from
tree_root, which is already initialized.
Signed-off-by: Arne Jansen <sensille@gmx.net>
---
2013 Aug 02
2
[PATCH] Btrfs: allow compressed extents to be merged during defragment
The rule originally comes from nocow writing, but snapshot-aware
defrag is a different case, the extent has been writen and we''re
not going to change the extent but add a reference on the data.
So we''re able to allow such compressed extents to be merged into
one bigger extent if they''re pointing to the same data.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
2008 Aug 02
3
crash when mounting
Hi guys,
I was playing on vmware with btrfs on complete disks /dev/sd{b,c,d,e}.
Next I decided to use partitions, so I created /dev/sd{b,c,d,e}1 and
used those, worked fine! Afterward, I mistakenly re-ran an old command
on the full disk ( mount -t btrfs -o subvol=. /dev/sdb /mnt/ ) notice
this is sdb not sdb1, and I got this spectacular kernel freeze. Let me
know if that''s some bug.
2013 Dec 11
5
Updated btrfs-next
Hello,
I just updated and pushed btrfs-next, if it is missing something let me
know. I had to kick out the printk formatting patch because it didn''t
compile and I didn''t take Miao''s background enospc flushing stuff since
some of it didn''t apply and 5/5 hasn''t been updated to force waiting on
background flushers. Let me know if I missed anything
2008 Jul 18
4
btrfsctl -A not returning useful information
[root@btrfs progs-unstable]# btrfsctl -A /dev/sdb
ioctl returns 0
[root@btrfs progs-unstable]# btrfsctl -A /dev/sdc
ioctl returns 0
/dev/sdb has a btrfs, while /dev/sdc is blank. What''s that output
supposed to mean ? Is it a bug ?
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2010 Aug 03
4
why does btrfs pronounce "butter-eff-ess"?
As far as I know, btrfs comes from "btree file system", but why does
btrfs pronounce "butter-eff-ess"?
--
Wang Shaoyan
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2011 May 12
4
btrfs device scan
I have a couple computers running 2.6.38
(Ubuntu Natty 2.6.38-8-generic), and on both of them
"btrfs device scan" comes back with nothing other than
"failed to read /dev/sr0"
One computer has a btrfs RAID-1 volume, and the other has two separate
btrfs filesystems. The results are the same whether the filesystems are
mounted or not.
Why is "btrfs device scan" not
2012 Oct 07
3
Wiki (scrub)
Hi All,
The official wiki seems to have lost references to "scrub" if not other
commands. The last changes iss filled with account creation so I can''t see
easily when that happened.
Have I missed a policy change go through which is not reflected in the
(Debian/Siduction) btrfs userland program yet or has something else happened?
Kind regards
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2010 Jan 22
1
R: Re: mount command not honoring rootflags passed
Hi Thomas,
>----Messaggio originale----
>Da: thomas@kupper.org
>Data: 22/01/2010 10.48
>A: "Leszek Ciesielski"<skolima@gmail.com>
>Cc: "linux-btrfs"<linux-btrfs@vger.kernel.org>
>Ogg: Re: mount command not honoring rootflags passed
>
>
>On 22 Jan 2010, at 10:40, Leszek Ciesielski wrote:
>
>> On Fri, Jan 22, 2010 at 10:30 AM,
2011 Oct 16
2
unresolved ref root error
Hello,
On a newly created filesystem with btrfs-progs-git-20111009 and the 3.1.0-rc8
kernel I am getting the following error when doing btrfsck after main OS
installation
fs tree 256 refs 2
unresolved ref root 256 dir 256 index 2 namelen 8 name __active error 600
found 4215058432 bytes used err is 1
total csum bytes: 3962760
total tree bytes: 157192192
total fs tree bytes: 146976768
2010 Oct 24
4
Determine if a given fs is a btrfs fs
Hi,
I''ve some btrfs fs which are encrypted with loopaes.
I decrypt them in a script during bootup. Now I want to determine if the decrypted fs
is a btrfs fs. If not I missspelled the password and I can handle that error in my
script.
Thanks for any help!
Felix
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