reiser4: mv changes mtime ?

[Mickael Marchand <Mickael.Marchand@ujf-grenoble.fr>]

Hi,

I am giving a shot at reiser4 to make rsync snapshots backups (using
hard links and incremental rsync).
this works definitely great apart from 2 minor bugs :)

1 : it seems that mv directory/ directory2/ changes the mtime of the
directory. This is not the case with reiser3. Is this intentional ?
(it basically breaks my recover-from-snapshots script which uses the
mtime ;)

2 : this was posted on lkml today but it fits better here I guess :

2.6.12-rc1-mm4 config at
http://www-fourier.ujf-grenoble.fr/~mmarcha/config-2.6.12-rc1-mm4.gz

running on a bi-opteron (debian-amd64),
I got some "flushing like mad" warning messages from reiser4 (which
are safe apparently).
and this soft lookup BUG caused by reiser4 I think :

BUG: soft lockup detected on CPU#0!

Modules linked in: ipv6 parport_pc parport eth1394 ehci_hcd uhci_hcd
ohci1394 ieee1394 ohci_hcd usbcore snd_intel8x0 snd_ac97_codec snd_pcm
snd_timer snd snd_page_alloc i2c_amd756 i2c_amd8111 i2c_isa w83781d
i2c_sensor i2c_core e1000
Pid: 25291, comm: pdflush Not tainted 2.6.12-rc1-mm4
RIP: 0010:[<ffffffff8021f7de>] <ffffffff8021f7de>{protect_extent_nodes+382}
RSP: 0018:ffff81007df45678  EFLAGS: 00000202
RAX: ffff810015c7c5e0 RBX: ffff81007c609000 RCX: ffff81001074ba60
RDX: ffff81001074b220 RSI: ffff81001074b1c0 RDI: ffff81001074b210
RBP: 0000002000000000 R08: ffff81007df458a0 R09: ffff810044068e14
R10: 000000000000001c R11: ffffffff802119a0 R12: 00007fe07df455e0
R13: ffff81007c609004 R14: ffff81007df4565c R15: 00007fe000000001
FS:  00002aaaaadfeae0(0000) GS:ffffffff806e7840(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00002aaaaaac2000 CR3: 000000009bc83000 CR4: 00000000000006e0

Call Trace:<ffffffff8021f7da>{protect_extent_nodes+378}
<ffffffff8021c00e>{extent_size+30}
       <ffffffff801f5df9>{txnh_get_atom+41}
<ffffffff8021ffd2>{alloc_extent+562}
       <ffffffff8020a0bc>{plugin_by_unsafe_id+28}
<ffffffff80220bd1>{item_length_by_coord+17}
       <ffffffff801f8a4f>{handle_pos_on_twig+351}
<ffffffff801fabc6>{flush_current_atom+2022}
       <ffffffff801f7aca>{flush_some_atom+458}
<ffffffff801a2993>{generic_sync_sb_inodes+723}
       <ffffffff8014cc50>{keventd_create_kthread+0}
<ffffffff80203b85>{reiser4_sync_inodes+229}
       <ffffffff801a2bd9>{writeback_inodes+137}
<ffffffff8016012c>{background_writeout+124}
       <ffffffff80160c10>{pdflush+0} <ffffffff80160d4c>{pdflush+316}
       <ffffffff801600b0>{background_writeout+0}
<ffffffff8014cec9>{kthread+217}
       <ffffffff80133160>{schedule_tail+64} <ffffffff8010f59b>{child_rip+8}
       <ffffffff8014cc50>{keventd_create_kthread+0}
<ffffffff8014cdf0>{kthread+0}
       <ffffffff8010f593>{child_rip+0}

Please CC-me in answers, I am not subscribed here.

Cheers,
Mik


-- 
Mickael Marchand,
Ingenieur de recherche CNRS
Service Informatique, Institut Fourier - UFR Maths
Tel : 0476635655 Fax : 0476514478