Re: [PATCH v3] Btrfs: fix task hang under heavy compressed write

On Sat, Aug 16, 2014 at 03:28:11PM +0800, Miao Xie wrote: > On Fri, 15 Aug 2014 23:36:53 +0800, Liu Bo wrote: > > This has been reported and discussed for a long time, and this hang occurs > > in > > both 3.15 and 3.16. > > > > Btrfs now migrates to use kernel workqueue, but it introduces this ha

Debian 3.14.13-2 lockup

I've attached the dmesg output from a system running Debian kernel 3.14.13 which locked up. Everything which needed to write to disk was blocked. The dmesg output didn't catch the first messages which had scrolled out of the buffer. As the disk wasn't writable there was nothing useful in /va

[PATCH] btrfs: ioctl BTRFS_IOC_FS_INFO and BTRFS_IOC_DEV_INFO miss-matched with slots

ioctl BTRFS_IOC_FS_INFO return num_devices which does _not_ include seed device, But the following ioctl BTRFS_IOC_DEV_INFO counts and gets seed disk when probed. So in the userland we hit a count-slot missmatch bug.. get_fs_info() :: BUG_ON(ndevs >= fi_a

[PATCH] make 'btrfs filesystem show' to work when seeding

yeah. btrfs filesystem show didn't work any time before as in the test case below. mkfs.btrfs /dev/sdb -f btrfstune -S 1 /dev/sdb mount /dev/sdb /btrfs btrfs dev add /dev/sdc /btrfs btrfs fi show <-- fails. kindly ref to the commit log for bug and its fix details. Anand Jain (1): btrfs-progs:

[PATCH] btrfs-progs: do a separate probe for _transient_ replacing device As mentioned in the kernel patch btrfs: ioctl BTRFS_IOC_FS_INFO and BTRFS_IOC_DEV_INFO miss-matched with slots

The count as returned by BTRFS_IOC_FS_INFO is the number of slots that btrfs-progs would allocate for the BTRFS_IOC_DEV_INFO ioctl. Since BTRFS_IOC_DEV_INFO would loop across the seed devices, So its better ioctl BTRFS_IOC_FS_INFO returns the total_devices instead of num_devices. The above mention

[PATCH v2] btrfs: ioctl BTRFS_IOC_FS_INFO and BTRFS_IOC_DEV_INFO miss-matched with slots

ioctl BTRFS_IOC_FS_INFO return num_devices which does _not_ include seed device, But the following ioctl BTRFS_IOC_DEV_INFO counts and gets seed disk when probed. So in the userland we hit a count-slot missmatch bug.. get_fs_info() :: BUG_ON(ndevs >= fi_a

[PATCH v2] make 'btrfs filesystem show' to work when seeding

yeah. btrfs filesystem show didn't work any time before as in the test case below. mkfs.btrfs /dev/sdb -f btrfstune -S 1 /dev/sdb mount /dev/sdb /btrfs btrfs dev add /dev/sdc /btrfs btrfs fi show <-- fails. kindly ref to the commit log for bug and its fix details. Anand Jain (1): btrfs-progs:

[PATCH v2] btrfs-progs: do a separate probe for transient replacing device

As mentioned in the kernel patch btrfs: ioctl BTRFS_IOC_FS_INFO and BTRFS_IOC_DEV_INFO miss-matched with slots The count as returned by BTRFS_IOC_FS_INFO is the number of slots that btrfs-progs would allocate for the BTRFS_IOC_DEV_INFO ioctl. Since BTRFS_IOC_DEV_INFO would loop across the seed d

btrfs restore memory corruption (bug: 82701)

Hi, I did a checkout of the latest btrfs progs to repair my damaged filesystem. Running btrfs restore gives me several failed to inflate: -6 and crashes with some memory corruption. I ran it again with valgrind and got: valgrind --log-file=x2 -v --leak-check=yes btrfs restore /dev/sda9 /mnt/bac

[PATCH v2] btrfs-progs: fix typo in subvol list usage

Signed-off-by: David Disseldorp --- Documentation/btrfs-subvolume.txt | 2 +- cmds-subvolume.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/btrfs-subvolume.txt b/Documentation/btrfs-subvolume.txt index a519131..c8b9928 100644 --- a/Documen

Re: [PATCH 1/1] Btrfs: fix sparse warning

> On 05 August 2014 at 23:32 Zach Brown wrote: > > > > > > Hello Zach, > > > > > > > >     Here's an untested patch which > > > > > > Try testing it.  It's easy with virtualization and xfstests. > > > > > > You'll find that sending to a file fails because each individual file > > > write call th

fs_mark test on btrfs on 3.16.0-rc6+ #1 SMP

Hi, I ran the fs_mark test on a single empty hard drive. After the test, the df -h results are: /dev/sdk1 917G   39G  832G   5% /ext4 /dev/sdj1 932G   53G  850G   6% /btrfs The test result for btrfs shows it ran 15 hours. Note there is no file/dir remove operation whic

Re: Putting very big and small files in one subvolume?

Good questions and already good comment given. For another view... On 17/08/14 13:31, Duncan wrote: > Shriramana Sharma posted on Sun, 17 Aug 2014 14:26:06 +0530 as excerpted: > >> Hello. One more Q re generic BTRFS behaviour. >> https://btrfs.wiki.kernel.org/index.php/Main_Page specifically >>

Re: Blocked tasks on 3.15.1

> "MM" == Marc MERLIN writes: MM> Note 3.16.0 is actually worse than 3.15 for me. Here (a single partition btrfs), 3.16.0 works fine, but 3.17-rc1 fails again. My /var/log is also a compressed, single-partition btrfs; that doesn't show the problem with any version. Just the partition with

[PATCH] btrfs: don't go readonly on existing qgroup items

btrfs_drop_snapshot() leaves subvolume qgroup items on disk after completion. This can cause problems with snapshot creation. If a new snapshot tries to claim the deleted subvolumes id, btrfs will get -EEXIST from add_qgroup_item() and go read-only. The following commands will reproduce this proble

Re: [PATCH] btrfs: fix leak in qgroup_subtree_accounting() error path

On Sun, Aug 17, 2014 at 03:09:21PM -0500, Eric Sandeen wrote: > Coverity pointed this out; in the newly added > qgroup_subtree_accounting(), if btrfs_find_all_roots() > returns an error, we leak at least the parents pointer, > and possibly the roots pointer, depending on what failure > occurs. > >

Re: [BUG] 3.17 rc1 kernel BUG at fs/btrfs/extent_io.c:2124! oops when reading corrupt file on btrfs raid5

This reproduces in a not tainted kernel 3.17.0-0.rc1.git0.1.fc22.x86_64. I still used btrfs-progs v3.14.2-167-ge514381 to create the new raid5 volume, so it seems whatever fixed it in for-linus is not in for-linus2. [ 45.935848] BTRFS info (device sdc): disk space caching is enabled [ 54.8

Re: fs_mark test on btrfs on 3.16.0-rc6+ #1 SMP

On Mon, Aug 18, 2014 at 05:38:17PM +, Ming Lei wrote: > > Hi, > > I ran the fs_mark test on a single empty hard drive. After the test, the df > -h results are: > > /dev/sdk1 917G   39G  832G   5% /ext4 > /dev/sdj1 932G   53G  850G   6% /btrfs > > The test result for

Re: fs_mark test on btrfs on 3.16.0-rc6+ #1 SMP

On Mon, 18 Aug 2014 17:38:17 +, Ming Lei wrote: > > Hi, > > I ran the fs_mark test on a single empty hard drive. After the test, the df > -h results are: > > /dev/sdk1 917G 39G 832G 5% /ext4 > /dev/sdj1 932G 53G 850G 6% /btrfs > > The test result for btrfs

[BUG] cannot mount subvolume with selinux context

Hi, Description of the problem: mount btrfs with selinux context, then create a subvolume, the new subvolume cannot be mounted, even with the same context. mkfs -t btrfs /dev/sda5 mount -o context=system_u:object_r:nfs_t:s0 /dev/sda5 /mnt/btrfs btrfs subvolume create /mnt/btrfs/subvol mount -o s

Re: Putting very big and small files in one subvolume?

Martin posted on Mon, 18 Aug 2014 19:16:20 +0100 as excerpted: > Also, for the file segment being defragged, abandon any links to other > snapshots to in effect deliberately replicate the data where appropriate > so that data segment is fully defragged. FWIW, this is the current state. The initi

Re: Putting very big and small files in one subvolume?

Martin posted on Mon, 18 Aug 2014 19:16:20 +0100 as excerpted: >> OTOH, I tend to be rather more of an independent partition booster than >> many. The biggest reason for that is the too many eggs in one basket >> problem. Fully separate filesystems on separate partitions... > > I do so similarl

Re: exact nature of send/receive problems?

Shriramana Sharma posted on Sun, 17 Aug 2014 18:17:48 +0530 as excerpted: > Hello. This is wrt this thread: > http://www.spinics.net/lists/linux-btrfs/msg36639.html > > The OP of that thread had not clarified (IMO) what exactly he means by > "unreliability of btrfs send/receive". Is it only via s