Re: WARNING: at fs/btrfs/extent_io.c:4718 map_private_extent_buffer+0xd4/0xe0 [btrfs]()

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On Fri, Feb 22, 2013 at 1:10 PM, Josef Bacik <jbacik@xxxxxxxxxxxx> wrote:
> On Fri, Feb 22, 2013 at 10:52:19AM -0700, Mace Moneta wrote:
>> On Fri, Feb 22, 2013 at 12:44 PM, Josef Bacik <jbacik@xxxxxxxxxxxx> wrote:
>> > On Fri, Feb 22, 2013 at 10:22:04AM -0700, Mace Moneta wrote:
>> >> On Fri, Feb 22, 2013 at 11:53 AM, Josef Bacik <jbacik@xxxxxxxxxxxx> wrote:
>> >> > On Fri, Feb 22, 2013 at 07:46:16AM -0700, Mace Moneta wrote:
>> >> >> https://bugzilla.redhat.com/show_bug.cgi?id=906142
>> >> >>
>> >> >> With 3.8 kernels in Fedora 18, using encfs on btrfs I get the
>> >> >> following error.  It can take hours of use before I get a
>> >> >> reoccurrence, and I need to btrfsck, btrfs-zero-log, and/or mount with
>> >> >> '-o recovery' to get the filesystem back after a reboot.  No data
>> >> >> appears to be lost, and a scrub runs to completion with no errors.
>> >> >
>> >> > Could you do
>> >> >
>> >> > gdb btrfs.ko
>> >> > list *(btrfs_log_inode+0x3b8)
>> >> >
>> >> > and tell me what it says?  Thanks,
>> >> >
>> >> > Josef
>> >>
>> >> # uname -r
>> >> 3.8.0-0.rc7.git0.1.fc19.x86_64
>> >>
>> >> # gdb /usr/lib/modules/3.8.0-0.rc7.git0.1.fc19.x86_64/kernel/fs/btrfs/btrfs.ko
>> >>
>> >
>> > Sigh sorry, I miseed the other line because of line wrapping, can you do
>> >
>> > list *(btrfs_log_changed_extents+0x384)
>> >
>> > Thanks,
>> >
>> > Josef
>>
>> (gdb) list *(btrfs_log_changed_extents+0x384)
>> 0x65264 is in btrfs_log_changed_extents (fs/btrfs/ctree.h:2731).
>> 2726                       generation, 64);
>> 2727    BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct
>> btrfs_file_extent_item,
>> 2728                       disk_num_bytes, 64);
>> 2729    BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
>> 2730                      offset, 64);
>> 2731    BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
>> 2732                       num_bytes, 64);
>> 2733    BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
>> 2734                       ram_bytes, 64);
>> 2735    BTRFS_SETGET_FUNCS(file_extent_compression, struct
>> btrfs_file_extent_item,
>> (gdb)
>
> Ok nothing obvious is jumping out at me, anything specifc to your btrfs setup?
> Mount options, raid etc.  I'm going to setup encfs up here and hammer it with
> fsstress and see if I can reproduce.  Thanks,
>
> Josef

The btrfs mount options I'm using are: subvol=home,noatime,autodefrag

The encfs is mounted with default options.
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