Dear all.
The following error occured with kernel 2.6.12-rc5, lvm2 2.01.04-5 on debian,
using an adaptec 2200S raid controller (write cache disabled), with 7 73G disk
on each channel, in a mirror configuration, where the mirrors are seen by the
OS as /dev/sdb, /dev/sdc .... /dev/sdh.
One vg is created, called "rack1_all", and one lv with:
lvcreate -i7 -I4 -L400G -nsamba_space rack1_all
mkfs.xfs /dev/rack1_all/samba_space
which is mounted, and works fine.
When I create a snapshot with:
lvcreate -L10G -s -ndsnap /dev/rack1_all/samba_space
This snapshot works fine, however, when I create it with:
lvcreate -i7 -I4 -L10G -s -ndsnap /dev/rack1_all/samba_space
I get:
tacitus:/home/jeroen/lvm2-2.01.04/tools# lvcreate -i7 -I4 -L10G -s -ndsnap
/dev/rack1_all/samba_space
Rounding size (2560 extents) up to stripe boundary size (2562 extents)
Segmentation fault
The -I4 option doesn't seem to matter, it's just when I try to stripe the
snapshot it segfaults.
This is the same with -vvvvvvv: (the last part of it, the rest looks fine)
#metadata/pv_map.c:177 Allowing allocation on /dev/sdf start PE 14629
length 2864
#metadata/pv_map.c:177 Allowing allocation on /dev/sdg start PE 14629
length 2864
#metadata/pv_map.c:177 Allowing allocation on /dev/sdh start PE 14629
length 2864
#archiver.c:109 Archiving volume group "rack1_all" metadata.
Segmentation fault
And this is the backtrace (thanks to strib on #lvm):
(gdb) run
Starting program: /home/jeroen/lvm2-2.01.04/tools/lvcreate -i7 -I4 -L10G -s
-ndsnap /dev/rack1_all/samba_space
File descriptor 3 left open
File descriptor 4 left open
File descriptor 5 left open
Rounding size (2560 extents) up to stripe boundary size (2562 extents)
Program received signal SIGSEGV, Segmentation fault.
0x08094aea in _text_export (seg=0x8103050, f=0x80f54c0)
at snapshot/snapshot.c:85
85 outf(f, "origin = \"%s\"", seg->origin->name);
(gdb) backtrace
#0 0x08094aea in _text_export (seg=0x8103050, f=0x80f54c0)
at snapshot/snapshot.c:85
#1 0x08077d99 in _print_segment (f=0x80f54c0, vg=0xa, count=0, seg=0x8103050)
at format_text/export.c:421
#2 0x080786bb in _print_lvs (f=0x80f54c0, vg=0x80d7f10)
at format_text/export.c:622
#3 0x08078b80 in _text_vg_export (f=0x80f54c0, vg=0x80d7f10,
desc=0x81030e8 "Created *before* executing
'/home/jeroen/lvm2-2.01.04/tools/lvcreate -i7 -I4 -L10G -s -ndsnap
/dev/rack1_all/samba_space'")
at format_text/export.c:724
#4 0x08078d56 in text_vg_export_file (vg=0x0, desc=0x0, fp=0x0)
at format_text/export.c:766
#5 0x080768e8 in archive_vg (vg=0x80d7f10, dir=0x80d5928 "/etc/lvm/archive",
desc=0x0, retain_days=1, min_archive=1) at format_text/archive.c:263
#6 0x0804f627 in __archive (vg=0x80d7f10) at archiver.c:94
#7 0x0804f711 in archive (vg=0x80d7f10) at archiver.c:110
#8 0x080529a4 in _lvcreate (cmd=0x80bf828, lp=0xbf927080) at lvcreate.c:559
#9 0x080530b6 in lvcreate (cmd=0x80bf828, argc=0, argv=0x0) at lvcreate.c:655
#10 0x08056cb7 in _run_command (cmd=0x80bf828, argc=1, argv=0xbf92721c)
at lvmcmdline.c:857
#11 0x080579a6 in lvm2_main (argc=7, argv=0xbf927204) at lvmcmdline.c:1469
#12 0x080674a9 in main (argc=0, argv=0x0) at lvm.c:20
(gdb)
It seems like a bug to me, hope it's fixable,
Cheers,
Jeroen.
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