DragonFlyBSD

Hi,

HAMMER filesystem recently created on a LVM stripe of 5 disks. Box has 1GB with no swap.

databank# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
lv_root main wi-a 186.17g

I got no dump but I have located which panic in the code was hit: http://pkgbox64.dragonflybsd.org/xref/DragonFly-master/sys/vfs/hammer/hammer_redo.c#91

Backtrace function call is:

panic()
panic()
hammer_generate_redo()
hammer_vop_write()
vop_write()
vn_write()
kern_pwritev()
sys_extpwrite()
syscall2()
Xint0x80_syscall()

Image: http://leaf.dragonflybsd.org/~tuxillo/archive/pics/panic_fifo.jpg

After rebooting and trying to mount again the HAMMER FS:

databank# mount -a
hammer: mount on /mnt/safe: Result too large

And dmesg shows:

HAMMER recovery check seqno=00d791fe
HAMMER recovery range 30000000070ef490-3000000004a90000
HAMMER recovery nexto 3000000004a90000 endseqno=00e638f5
HAMMER recovery undo 30000000070ef490-3000000004a90000 (488246128 bytes)(RW)
HAMMER Found REDO_SYNC 30000000070ef490
HAMMER Ignoring extra REDO_SYNC records in UNDO/REDO FIFO.
HAMMER recovery complete
HAMMER recovery redo 30000000070ef490-3000000004a90000 (488246128 bytes)(RW)
HAMMER Find extended redo 30000000070ef490, 0 extbytes
HAMMER Find extended redo failed 34, unable to run REDO
HAMMER End redo recovery

I've activated swap and I'm going to try to reproduce it again and see if I can get a dump, but any tip would be appreciated :)

Cheers,
Antonio Huete