Re: [Bug 50181] New: Memory usage doubles after more then 20 hours of uptime.

[Dave Hansen <dave@linux.vnet.ibm.com>]

On 11/15/2012 03:11 PM, Milos Jakovljevic wrote:
> Or maybe, it is just some problem with nvidia blob and 3.7 kernel
> loosing VM_RELEASE  (in a blob's mmap.c it was replaced with
> VM_DONTEXPAND | VM_DONTDUMP ).  - or maybe I'm just saying nonsense
> here.

I'm using Intel graphics, so it's not nvidia related for me, at least.

I've been recording a bunch of gunk from /proc once a minute for the
past 16 hours or so.  I've grepped some of it in to a log file (but I've
got a *LOT* more than this):

	http://sr71.net/~dave/linux/leak-20121113/log.1353087988.txt.gz

>From meminfo, it shows MemFree/Buffers/Cached/AnonPages/Slab/PageTables,
and their sum.  That should capture _most_ of the memory use on the
system, and if we see that sum going down, it's probably a sign of the
leak, especially when we see a trend over a long period.  The file is in
roughly this format, if anyone cares:

	<nr/date>  <meminfo fields> sums:  <sum fields> <delta>

The system in question is my laptop.  What I can tell is that it doesn't
leak much when I'm not using it.  But, it's leaking pretty steadily
since I started using the system today (~6am in the logs).  It
_averages_ leaking about 400kB/minute when idle and almost 9MB/minute
when in active use.

I've tried to provoke the leak doing specific things like large
downloads, kernel compiles, watching video, alloc'ing a bunch of
transparent huge pages, then exiting...  No smoking gun so far.

Anybody have ideas what to try next or want to poke holes in my
statistics? :)

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