Cheers, I will try with a full disk device sometime later today.
Thanks for you help,
Joseph.
On 3 March 2012 11:01, Kent Overstreet <koverstreet@xxxxxxxxxx> wrote:
> Strange, I don't see anything obvious in that log. Well, shouldn't be
> too hard to track down, I'll see if I can reproduce it.
>
> On Fri, Mar 2, 2012 at 2:37 PM, Joseph Glanville
> <joseph.glanville@xxxxxxxxxxxxxx> wrote:
>> Hi Kent,
>>
>> The block device did indeed get created in /dev and the correct
>> pointer exists in /sys/block/bcache0/dev
>> I straced pvcreate and attached the outout, I couldn't see anything
>> that far out of the ordinary though - bar the return that the device
>> had been filtered.
>> I am using commit f4c09286dd3f761310b24bc03e5ce95793a9a30c of
>> bcache-tools.git and commit 7c3e597ca0f5c87767548d1e9aced024aa558b2a
>> of linux-bcache.git
>>
>> The other thing I noticed was that the /dev/disk-by/uuid symlink
>> wasn't created. I went ahead and created this myself but I will
>> investigate why the udev rule didn't do this for me.
>>
>> Below is relevant lines from pvscan and pvcreate:
>>
>> dev05 ~ # cat pvscan.log | grep bcache
>> execve("/sbin/pvscan", ["pvscan", "/dev/bcache0"], [/* 23 vars */]) = 0
>> read(3, "strace\0pvscan\0/dev/bcache0\0", 31) = 27
>> readlink("/sys/class/block/bcache0",
>> "../../devices/virtual/block/bcache0"..., 1024) = 35
>> stat("/sys/devices/virtual/block/bcache0/uevent",
>> {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
>> readlink("/sys/devices/virtual/block/bcache0", 0x7fff9e17aea0, 1024) =
>> -1 EINVAL (Invalid argument)
>> stat("/sys/devices/virtual/block/bcache0/uevent",
>> {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
>> open("/sys/devices/virtual/block/bcache0/uevent", O_RDONLY|O_CLOEXEC) = 4
>> read(4, "MAJOR=252\nMINOR=0\nDEVNAME=bcache"..., 4096) = 47
>> readlink("/sys/devices/virtual/block/bcache0/subsystem",
>> "../../../../class/block"..., 1024) = 23
>> read(4, "N:bcache0\nW:40\nI:580433490\n", 4096) = 27
>> stat("/dev/bcache0", {st_mode=S_IFBLK|0660, st_rdev=makedev(252, 0), ...}) = 0
>> stat("/sys/class/block/bcache0/dev", {st_mode=S_IFREG|0444,
>> st_size=4096, ...}) = 0
>> open("/sys/class/block/bcache0/dev", O_RDONLY) = 6
>>
>> dev05 ~ # cat pvcreate-strace.log | grep bcache
>> execve("/sbin/pvcreate", ["pvcreate", "/dev/bcache0"], [/* 23 vars */]) = 0
>> read(3, "strace\0pvcreate\0/dev/bcache0\0", 31) = 29
>> stat("/dev/bcache0", {st_mode=S_IFBLK|0660, st_rdev=makedev(252, 0), ...}) = 0
>> readlink("/sys/dev/block/252:0",
>> "../../devices/virtual/block/bcache0", 1024) = 35
>> stat("/sys/devices/virtual/block/bcache0/uevent",
>> {st_mode=S_IFREG|0644, st_size=4096, ...}) = 0
>> stat("/sys/class/block/bcache0/dev", {st_mode=S_IFREG|0444,
>> st_size=4096, ...}) = 0
>> open("/sys/class/block/bcache0/dev", O_RDONLY) = 6
>> stat("/dev/bcache0", {st_mode=S_IFBLK|0660, st_rdev=makedev(252, 0), ...}) = 0
>> stat("/dev/bcache0", {st_mode=S_IFBLK|0660, st_rdev=makedev(252, 0), ...}) = 0
>> stat("/sys/class/block/bcache0/dev", {st_mode=S_IFREG|0444,
>> st_size=4096, ...}) = 0
>> open("/sys/class/block/bcache0/dev", O_RDONLY) = 6
>> write(2, "Device /dev/bcache0 not found (o"..., 56Device /dev/bcache0
>> not found (or ignored by filtering).) = 56
>>
>> Kind regards,
>> Joseph.
>>
>>
>> On 2 March 2012 17:44, Kent Overstreet <kent.overstreet@xxxxxxxxx> wrote:
>>> Oh - try stracing the pvcreate and see what happens.
>>>
>>> On Thu, Mar 1, 2012 at 10:03 PM, Kent Overstreet
>>> <kent.overstreet@xxxxxxxxx> wrote:
>>>> Weird.
>>>>
>>>> Did the /dev/bcache0 device get create created by udev?
>>>>
>>>> It's possible my code isn't poking the right thing. *mutters about the
>>>> block layer...*
>>>>
>>>> On Thu, Mar 1, 2012 at 9:49 PM, Joseph Glanville
>>>> <joseph.glanville@xxxxxxxxxxxxxx> wrote:
>>>>> Hi,
>>>>>
>>>>> I can't use bcache devices as members of lvm volume groups because
>>>>> dmsetup can't find the devices.
>>>>> It provides the ever useful feedback of:
>>>>> # pvcreate /dev/bcache0
>>>>> Device /dev/bcache0 not found (or ignored by filtering).
>>>>>
>>>>> My LVM.conf is only filtering out nbd devices:
>>>>> filter = [ "r|/dev/nbd.*|", "a/.*/" ]
>>>>>
>>>>> Any insight would be greatly appreciated. :)
>>>>>
>>>>> I also noted that bcache devices don't appear in iostat..
>>>>>
>>>>> Joseph.
>>>>>
>>>>> --
>>>>> Founder | Director | VP Research
>>>>> Orion Virtualisation Solutions | www.orionvm.com.au | Phone: 1300 56
>>>>> 99 52 | Mobile: 0428 754 846
>>>>>
>>>>>
>>>>> --
>>>>> Founder | Director | VP Research
>>>>> Orion Virtualisation Solutions | www.orionvm.com.au | Phone: 1300 56
>>>>> 99 52 | Mobile: 0428 754 846
>>>>> --
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>>
>>
>> --
>> Founder | Director | VP Research
>> Orion Virtualisation Solutions | www.orionvm.com.au | Phone: 1300 56
>> 99 52 | Mobile: 0428 754 846
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