Robert Nichols
2015-Sep-03 01:04 UTC
[CentOS] Starting emacs gives "shmget failed: error 28" message
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? -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.
Nicolas Thierry-Mieg
2015-Sep-03 09:00 UTC
[CentOS] Starting emacs gives "shmget failed: error 28" message
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).
Robert Nichols
2015-Sep-03 18:24 UTC
[CentOS] Starting emacs gives "shmget failed: error 28" message
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. -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.