[Lxc-users] errors

[Stéphane Graber]

On 05/23/2013 01:46 AM, Tamas Papp wrote:
> On 05/23/2013 04:27 AM, Stéphane Graber wrote:
>> Oops, looks like I broke lxc-ls --fancy with my recent get_ips() API
>> change. I'll fix it directly to staging (trivial fix) and trigger a new
>> daily build, you should be able to update to a fixed package in the next
>> couple of hours.
>>
> 
> hi,
> 
> Although the the package is not here, I downloaded the raw file from
> github, and the function is indeed fixed.
> 
> Though still there is the FUTEX_WAIT error
> strace -ff lxc-ls --fancy:
> 
> 
> [...]
> geteuid()                               = 0
> statfs("/dev/shm", {f_type=0x1021994, f_bsize=4096, f_blocks=16498192,
> f_bfree=16498156, f_bavail=16498156, f_files=16498192, f_ffree=16498155,
> f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0
> futex(0x7ff06b4cc31c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
> open("/dev/shm/sem.lxcapi.jcb-vmc02", O_RDWR|O_NOFOLLOW) = 3
> fstat(3, {st_mode=S_IFREG|0640, st_size=32, ...}) = 0
> mmap(NULL, 32, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0x7ff06b65d000
> close(3)                                = 0
> stat("/var/lib/lxc/jcb-vmc02/config", {st_mode=S_IFREG|0644,
> st_size=1293, ...}) = 0
> futex(0x7ff06b65d000, FUTEX_WAIT, 0, NULL
> 
> 
> And it's waiting here...
> 
> What is it waiting for?
> I quite lost now..
> 
> Thanks,
> tamas

That looks like broken locking, though Serge would know for sure.
You may want to try clearing /dev/shm/*lxc* and see if that fixes the
problem (not usually recommended as those locks are there for a reason).

-- 
Stéphane Graber
Ubuntu developer
http://www.ubuntu.com

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