search for: endios

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2013 May 22
1
Top shows brtfs-cache-1 and brtfs-endio-met while the hard drives seem busy
Hi, I have setup about a year ago a BTRFS RAID 1 filesystem on two 2TB Western Digital WD20EARS hard drives and I have created subvolumes that I mount regularly as I need them. I put mostly music, videos and various files on them as well as some Git bare repositories for my work files but for the last couple of weeks, there seems to be some activity happening on the drives for a few minutes and
2011 Jul 01
2
Re: [btrfs-transacti] & btrfs-endio-wri] - WAS: Re: [btrfs-delalloc-]
On 06/30/2011 09:13 PM, Josef Bacik wrote: > On 06/30/2011 10:12 AM, Proskurin Kirill wrote: >> On 06/29/2011 08:14 PM, Josef Bacik wrote: >>>> Ok - I upgrade to 2.6.39-2 but it is seems to all things get worse. >>>> Now I see [btrfs-transacti]& btrfs-endio-wri] 80-100% all the time and >>>> io performance looks like lower then before.
2013 Apr 13
0
btrfs crash (and softlockup btrfs-endio-wri)
I am using NFS over brtfs (vanilla 3.8.5) for heavy CoW to clone virtual disks with sizes 20-50GB. It worked OK for a couple of days, but yesterday it crashed. Reboot fixed the problem and I do not see any data corruption. I have a couple of different kdumps, I will include one as text and attach the other ones. I am using Fedora 18 with vanilla 3.8.5. The filesystem is created over a SAN volume
2011 Jun 27
7
[btrfs-delalloc-]
Hello all. What we have: SL6 - kernel 2.6.32-131.2.1.el6.x86_64 btrfs on mdadm RAID5 with 8 HDD - 27T partition. I see this at top: 1182 root 20 0 0 0 0 R 100.0 0.0 16:39.73 [btrfs-delalloc-] And LA is grow. What is this and how can I fix it? -- Best regards, Proskurin Kirill -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of
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 Dec 12
1
kernel BUG at fs/btrfs/extent_io.c:4052 (kernel 3.5.3)
Hi all, Last week we had 2 times an "uncorrectable ecc memory error" crash on our server on the same memory module. After removing the faulty module and restarting the server, everything was working again. However, yesterday we had a soft lockup and had to restart the server again. No warning or ecc error this time. Everything is working now, but we want to avoid this in the future
2013 May 07
2
Kernel BUG: __tree_mod_log_rewind
I can get btrfs to throw a kernel bug easily by running btrfs fi defrag on some files in 3.9.0: May 7 01:57:33 caper kernel: [ 0.000000] Linux version 3.9.0-030900-generic (apw@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201304291257 SMP Mon Apr 29 16:58:15 UTC 2013 ... May 7 02:09:21 caper kernel: [ 726.745485] ------------[ cut here ]------------ May 7 02:09:21 caper
2013 Feb 13
0
Re: Heavy memory leak when using quota groups
On 12.02.2013 08:25, shyam btrfs wrote: > Hi Arne, Jan, > > I am using btrfs directly from Linux 3.8rc5 (commit > 949db153b6466c6f7cad5a427ecea94985927311). I am trying to use qgroups > functionality & with a basic random-write workload, it constantly > keeps leaking memory & within few minutes of IO, there is either > out-of-memory killer trying to kill some tasks or
2012 Sep 17
13
[PATCH 1/2 v3] Btrfs: use flag EXTENT_DEFRAG for snapshot-aware defrag
We''re going to use this flag EXTENT_DEFRAG to indicate which range belongs to defragment so that we can implement snapshow-aware defrag: We set the EXTENT_DEFRAG flag when dirtying the extents that need defragmented, so later on writeback thread can differentiate between normal writeback and writeback started by defragmentation. This patch is used for the latter one. Originally patch
2012 Nov 03
0
btrfs kernel threads producing high load and slow system down
Hello, I habe the problems described in here https://btrfs.wiki.kernel.org/index.php/Gotchas: Files with a lot of random writes can become heavily fragmented (10000+ extents) causing trashing on HDDs and excessive multi-second spikes of CPU load on systems with an SSD or large amount a RAM. On servers and workstations this affects databases and virtual machine images. The nodatacow mount option
2012 Mar 23
2
btrfs crash after disk reconnect
Observed on Linux 3.2.9 after the controller/disk flaked in-out. (The world still needs a SCSI error decoding tool to tell normal people what cmd and res are about.) [ 157.732885] device label srv devid 4 transid 11292 /dev/sdf [ 157.733201] btrfs: disk space caching is enabled [ 172.936515] device label srv devid 4 transid 11292 /dev/sdf [44106.091461] ata4.01: exception Emask 0x0 SAct 0x0
2012 Jul 10
6
[PATCH RFC] Btrfs: improve multi-thread buffer read
While testing with my buffer read fio jobs[1], I find that btrfs does not perform well enough. Here is a scenario in fio jobs: We have 4 threads, "t1 t2 t3 t4", starting to buffer read a same file, and all of them will race on add_to_page_cache_lru(), and if one thread successfully puts its page into the page cache, it takes the responsibility to read the page''s data. And
2011 Jul 08
5
btrfs hang in flush-btrfs-5
Hi - I''m trying btrfs with kernel 2.6.38.8-32.fc15.x86_64 (a Fedora kernel). I''m just doing a tar-to-tar copy onto the file system with compress- force=zlib. Here are some traces of the stuck processes. flush-btrfs-5 seems to be stuck: Jul 8 11:49:40 xback2 kernel: [74920.681032] flush-btrfs-5 D ffff88003c7bae60 0 11712 2 0x00000080 Jul 8 11:49:40 xback2 kernel:
2013 Oct 07
2
Some questions after devices addition to existing raid 1 btrfs filesystem
Hi, I have added 2x2Tb to my existing 2x2Tb raid 1 btrfs filesystem and then ran a balance: # btrfs filesystem show Total devices 4 FS bytes used 1.74TB devid 3 size 1.82TB used 0.00 path /dev/sdd devid 4 size 1.82TB used 0.00 path /dev/sde devid 2 size 1.82TB used 1.75TB path /dev/sdc devid 1 size 1.82TB used 1.75TB path /dev/sdb # btrfs
2012 Aug 31
0
oops with btrfs on zvol
Hi, I''m experimenting with btrfs on top of zvol block device (using zfsonlinux), and got oops on a simple mount test. While I''m sure that zfsonlinux is somehow also at fault here (since the same test with zram works fine), the oops only shows things btrfs-related without any usable mention of zfs/zvol. Could anyone help me interpret the kernel logs, which btrfs-zvol interaction
2013 Jul 03
1
WARNING: at fs/btrfs/backref.c:903 find_parent_nodes+0x616/0x815 [btrfs]()
I''ve upgraded to linux 3.10 and enabled extended inode refs and skinny metadata extent refs with these commands: btrfstune -r /dev/sdc1 btrfstune -x /dev/sdc1 Since then, I have "WARNING: at fs/btrfs/backref.c:903 find_parent_nodes+0x616/0x815 [btrfs]()" showing up like crazy: # grep -c "WARNING: at fs/btrfs/backref.c:903" syslog 181819 That''s after just
2012 May 22
1
warnings met in introduce extent buffer cache for each i-node patch
Miao, I was trying out your patch on scalability testing for BTRFS on v3.3 kernel. http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg14930.html However, I ran into a lot of warnings (see the dmesg below). Wonder if you have a more up to date version of this patch? In addition, I have to do this modification to fix a warning in your original patch. diff --git a/fs/btrfs/inode.c
2012 Jan 09
2
btrfs-related kernel oops due to media error
Hi, One of my disks, partitioned into a single btrfs partition, is showing media errors. The problem is that these errors lead to kernel panic from btrfs - that make the filesystem unusable until reboot - and therefore it is very hard for me to do a full backup of the data prior to changing the disk. My current kernel is 3.2.0-8-generic from Ubuntu/precise (based on linux 3.2-final) but I
2013 Jan 21
0
Tracking down causes of btrfs thread activity
Hi, I''ve been running btrfs on one of my machines for a few months now but I keep hitting performance issues. My system quite frequently freezes due to IO starvation. Looking at iotop it tends to show the large majority of the disk I/O being taken up with various btrfs tasks peeking at 7-8M/s, namely: btrfs-endio-wri btrfs-delayed-m btrfs-transacti btrfs-cleaner
2013 Aug 29
0
[PATCH] Btrfs: don't use an async starter for most of our workers
We only need an async starter if we can''t make a GFP_NOFS allocation in our current path. This is the case for the endio stuff since it happens in IRQ context, but things like the caching thread workers and the delalloc flushers we can easily make this allocation and start threads right away. Also change the worker count for the caching thread pool. Traditionally we limited this to 2