System is a Thinkpad 600X (Pentium III) w/ 576MB of RAM, 1GB of swap.
While testing 2.6.16-rc5 for ACPI issues, I ran across a vm behavior
that I've never seen before. I had just booted and logged in via xdm,
and had opened a few small files in emacs. All of a sudden
sudden emacs complained that:
Memory exhausted--use M-x save-some-buffers RET
I didn't have any large files opened, but:
$ ps u3817
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
sanjoy 3817 0.1 2.0 1246160 11992 ? S Mar09 0:11 emacs -iconic
No swap is being used despite emacs allegedly consuming 1.2GB of VM:
$ free
total used free shared buffers cached
Mem: 580924 219964 360960 0 29124 128956
-/+ buffers/cache: 61884 519040
Swap: 1068280 0 1068280
Is that possible (maybe it's all zero-filled memory)? If so, it's an
emacs bug that I've never seen before and I'll report it on the emacs
lists. If it's not possible, then maybe it's a kernel issue. I saved
/proc/3817/{maps,smaps,status,exe} just in case.
-Sanjoy
`A society of sheep must in time beget a government of wolves.'
- Bertrand de Jouvenal
Looks like a bug in emacs. It probably allocated a ton of memory ( 1.2
gigs?! ) and just didn't actually touch it, thus you still have plenty
of free physical memory and swap.
Sanjoy Mahajan wrote:
> System is a Thinkpad 600X (Pentium III) w/ 576MB of RAM, 1GB of swap.
>
> While testing 2.6.16-rc5 for ACPI issues, I ran across a vm behavior
> that I've never seen before. I had just booted and logged in via xdm,
> and had opened a few small files in emacs. All of a sudden
> sudden emacs complained that:
>
> Memory exhausted--use M-x save-some-buffers RET
>
> I didn't have any large files opened, but:
>
> $ ps u3817
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
> sanjoy 3817 0.1 2.0 1246160 11992 ? S Mar09 0:11 emacs -iconic
>
> No swap is being used despite emacs allegedly consuming 1.2GB of VM:
>
> $ free
> total used free shared buffers cached
> Mem: 580924 219964 360960 0 29124 128956
> -/+ buffers/cache: 61884 519040
> Swap: 1068280 0 1068280
>
> Is that possible (maybe it's all zero-filled memory)? If so, it's an
> emacs bug that I've never seen before and I'll report it on the emacs
> lists. If it's not possible, then maybe it's a kernel issue. I saved
> /proc/3817/{maps,smaps,status,exe} just in case.
>
> -Sanjoy
>
> `A society of sheep must in time beget a government of wolves.'
> - Bertrand de Jouvenal