Hi, I did some extensive tests of the new CLING allocator algorithm which should allow proper mirror extension. Testing with CVS HEAD dated 1st december, this is the error I get on lvextend in a specific test configuration: lvextend: metadata/pv_map.c:197: consume_pv_area: Assertion `to_go <= pva->count' failed. The problem arises in case of an unbalanced amount of free space on the data disks, mimages twisted (mimage_1 on PV0), and a hole (or at least two areas, I suppose) that needs to be allocated. The attached extendtest.sh is the generic code that leads to the error situation (set environment varibales disk[0-2] and vg respectively). The attached extendtest.vg is the meta data backup before the lvextend with 3 PVs of 128MB each. Best, Jens
Attachment:
extendtest.sh
Description: application/shellscript
# Generated by LVM2: Wed Dec 6 11:41:23 2006
contents = "Text Format Volume Group"
version = 1
description = "vgcfgbackup -f extend.vg dmtestvg"
creation_host = "t6345027" # Linux t6345027 2.6.9-prep #8 SMP Tue Jun 20 15:36:09 CEST 2006 s390x
creation_time = 1165401683 # Wed Dec 6 11:41:23 2006
dmtestvg {
id = "y4I28Z-YHvd-ZffY-f7Zw-515t-wB5U-dS5Hv2"
seqno = 12
status = ["RESIZEABLE", "READ", "WRITE"]
extent_size = 8192 # 4 Megabytes
max_lv = 0
max_pv = 0
physical_volumes {
pv0 {
id = "pdqOdr-j5sJ-RQeX-wfkd-DiJW-MeHt-Di4Izx"
device = "/dev/dm-0" # Hint only
status = ["ALLOCATABLE"]
dev_size = 262144 # 128 Megabytes
pe_start = 384
pe_count = 31 # 124 Megabytes
}
pv1 {
id = "k7EULd-xRpN-tFtV-gAW9-4zZc-njst-RLwKxk"
device = "/dev/dm-1" # Hint only
status = ["ALLOCATABLE"]
dev_size = 262144 # 128 Megabytes
pe_start = 384
pe_count = 31 # 124 Megabytes
}
pv2 {
id = "jNqEdU-ZWHf-kW7D-XFGG-ti9s-g0VQ-9hbdiL"
device = "/dev/dm-2" # Hint only
status = ["ALLOCATABLE"]
dev_size = 262144 # 128 Megabytes
pe_start = 384
pe_count = 31 # 124 Megabytes
}
}
logical_volumes {
lx1 {
id = "ITQ4ue-FCs4-MCmm-RSYX-Vnjh-TbtQ-Myy3uo"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 1 # 4 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 0
]
}
}
lx2 {
id = "6Ola3N-lOJt-G6Dw-ItpA-T8Cx-wNyn-G8x0IM"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 1 # 4 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv1", 0
]
}
}
m1 {
id = "FE1p7Y-Criz-mPWF-hJMJ-eY19-wjTM-uPocc0"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 9 # 36 Megabytes
type = "mirror"
mirror_count = 2
mirror_log = "m1_mlog"
region_size = 1024
mirrors = [
"m1_mimage_0", 0,
"m1_mimage_1", 0
]
}
}
lx3 {
id = "BpzPY5-E87r-VaeG-2FXV-uLId-P94j-5S17iu"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 3 # 12 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv2", 9
]
}
}
l2 {
id = "1XrfVI-QBn6-CqOF-fxPN-ja8C-rgor-nkrMLI"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 1 # 4 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv2", 13
]
}
}
l4 {
id = "R8CvQp-EDQx-Ui25-EGZM-i3Tf-zfSL-5Iv6AD"
status = ["READ", "WRITE", "VISIBLE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 1 # 4 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 11
]
}
}
m1_mlog {
id = "q5XnM3-VtHZ-EoB9-VT52-2Zct-5oCM-UeWwSg"
status = ["READ", "WRITE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 1 # 4 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv1", 1
]
}
}
m1_mimage_0 {
id = "NZHdXZ-mzK3-eDj8-nLTn-auSY-tou0-xuaicM"
status = ["READ", "WRITE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 9 # 36 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv2", 0
]
}
}
m1_mimage_1 {
id = "lJphqJ-NebL-V9LD-0SVe-n4ud-sisi-rkE1vO"
status = ["READ", "WRITE"]
segment_count = 1
segment1 {
start_extent = 0
extent_count = 9 # 36 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 1
]
}
}
}
}
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