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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>>>> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in
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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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