Hi, thanks for advice and sorry for the delay, I went in wilderness off the internet.

On Wed, Jul 3, 2013 at 12:10 AM, Paul Eggert <eggert@cs.ucla.edu> wrote:

On 07/02/2013 01:26 PM, Marek Otahal wrote:
> newfstatat(AT_FDCWD,
> ".kde4/share/apps/kopete/logs/JabberProtocol/XXXX-XXXX@chat-facebook-com

> /-XXXX@chat-facebook-com.201303.xml", {st_mode=S_IFREG|0644, st_size=2576,
> ...}, AT_SYMLINK_NOFOLLOW) = 0

This is one of the key system calls, but it's lacking
crucial details. What does strace -v say for that syscall?
strace -v should give info about st_blksize and st_blocks.

it reports:

$ strace -v du ~/.kde4/share/apps/kopete/logs/JabberProtocol/XXXX-XXXX@chat-facebook-com/-XXXX@chat-facebook-com.201303.xml 2>&1 | grep newfstatat
newfstatat(AT_FDCWD, "/home/marek/.kde4/share/apps/kopete/logs/JabberProtocol/XXXX-XXXX@chat-facebook-com/-XXXX@chat-facebook-com.201303.xml", {st_dev=makedev(0, 40), st_ino=6369, st_mode=S_IFREG|0644, st_nlink=1, st_uid=1000, st_gid=100, st_blksize=4096, st_blocks=36028797018963952, st_size=2576, st_atime=2013/03/11-21:56:17, st_mtime=2013/03/11-21:56:17, st_ctime=2013/03/11-21:56:17}, AT_SYMLINK_NOFOLLOW) = 0

it reports lots of blocks (btw, i tried defrag in btrfs before).

Regarding running fsck, well, it's btrfs, so the fsck is not so matured yet...what can i run for testing? Yet, no errors with the FS are reported/observed.

..it must have been a FS corruption, a cp -a (to /tmp on tmpfs), rm, and cp -a back cycle solved it.

$ strace -v du ~/.kde4/share/apps/kopete/logs/JabberProtocol/....
newfstatat(AT_FDCWD, ....., {st_dev=makedev(0, 40), st_ino=569698, st_mode=S_IFREG|0644, st_nlink=1, st_uid=1000, st_gid=100, st_blksize=4096, st_blocks=8, st_size=2576, st_atime=2013/03/11-21:56:17, st_mtime=2013/03/11-21:56:17, st_ctime=2013/07/23-23:30:07}, AT_SYMLINK_NOFOLLOW) = 0

Guys, sorry for the false alarm, and thanks for guidance here!

With best regards, Mark

--
Marek Otahal :o)