Re: Starting emacs gives "shmget failed: error 28" message

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Robert Nichols wrote:
> On 09/03/2015 04:00 AM, Nicolas Thierry-Mieg wrote:
>> On 09/03/2015 03:04 AM, Robert Nichols wrote:
>>> In CentOS 6.7, if I start emacs from a terminal session, I always see
>>> a message, "(emacs:{PID}): Gdk-WARNING **: shmget failed: error 28 (No
>>> space left on device)"
>>>
>>> The message is also logged to .xsession-errors, and that occurs
>>> regardless of how emacs is started. The same thing occurs with
>>> SELinux in permissive mode.
>>>
>>> Emacs version is emacs-23.1-28.el6.x86_64 .
>>>
>>> Output from strace shows:
>>>     shmget(IPC_PRIVATE, 393216, IPC_CREAT|0600) = -1 ENOSPC (No space
>>> left on device)
>>>
>>> /proc/mounts contains:
>>>     tmpfs /dev/shm tmpfs rw,seclabel,relatime 0 0
>>>
>>> and "df /dev/shm" shows:
>>>     Filesystem     1K-blocks  Used Available Use% Mounted on
>>>     tmpfs            8194164   172   8193992   1% /dev/shm
>>>
>>> I can't identify any behavior problems that I can relate to this,
>>> but it seems that something is wrong.  Any clues as to what?
>>>
>>
>> just a shot in the dark, but what do you have in
>> /proc/sys/kernel/shmmni ?
>>
>> According to man shmget:
>> ENOSPC All possible shared memory IDs have been taken  (SHMMNI),  or
>> allocating  a  segment  of  the requested  size  would  cause  the
>> system  to  exceed  the system-wide limit on shared memory (SHMALL).
>
> "cat /proc/sys/kernel/shmmni" shows 4096.
>
> And, I find that "wc -l /proc/sysvipc/shm" shows that they are indeed
> all in use. A badly coded java game appears to be the culprit. It's
> grabbing SHM IDs by the thousands.
>
> Thanks for the pointer.  Your shot in the dark was right on target.
>

Simple solution: vi.

        mark "someone had to say it"

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