2.6.0-test7: XFS fills files with 0-bytes after crash

[Patrick McHardy <kaber@trash.net>]

I recently encountered a problem with XFS: while hacking on some network 
stuff
I crashed my box multiple times. Every time I saved a file directly 
before the crash
XFS filled the file with 0-bytes (I assume at recovery). The file size 
was unchanged.
Syncing and waiting a couple of seconds before crashing the box helped. 
To confirm
my network hacking didn't accidentally damage XFS data structures I 
created a
module which does nothing more than dereferencing a NULL pointer in softirq
context, the problem persisted.

ver_linux:

Gnu C                  3.3.2
Gnu make               3.80
util-linux             2.12
mount                  2.12
module-init-tools      0.9.15-pre2
e2fsprogs              1.35-WIP
xfsprogs               2.5.11
nfs-utils              1.0.5
Linux C Library        2.3.2
Dynamic linker (ldd)   2.3.2
Procps                 3.1.12
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               5.0.91
Modules Loaded         sch_hfsc iptable_filter ipt_MARK iptable_mangle 
ip_tables cls_fw oprofile nfsd exportfs deflate zlib_deflate twofish 
serpent aes blowfish des sha256 sha1 md5 af_key 8250 serial_core nfs 
lockd sunrpc af_packet snd_pcm_oss snd_mixer_oss snd_ens1371 snd_rawmidi 
snd_seq_device snd_pcm snd_page_alloc snd_timer snd_ac97_codec snd 
soundcore 8139too mii rtc unix

xfsprogs 2.5.11-1 (debian)

If more specific information is required please tell me ..

Best regards,
Patrick