Xen devel - Jul 2009 - Memory leak associated with xc_map_foreign_batch?

I running a modified Xen x86_64 based on xen-unstable changeset f80cf52a4fb6,
linux-2.6.18-xen changset 271d9b9bee40. (Roughly 3.4.0-rc4-pre)

I''m running a process that loops using xc_map_foreign_batch() to map
bunch of pages from a couple of domains, compares some of them, and then calls
munmap() on the regions. /proc/meminfo shows a few extra K turning up as
Pagetables every 10 seconds or so and the machine eventually runs out of memory
and the OOM killer fires.

I was wondering if anyone knew of a memory leak in the
xc_map_foreign_batch()/munmap() path that might have been fixed or where I might
look? (Or possibly what silly thing I''m doing wrong.)

Thanks,

John Byrne


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My problem.
> -----Original Message-----
> From: Byrne, John (HP Labs)
> Sent: Sunday, July 19, 2009 10:54 PM
> To: xen-devel@lists.xensource.com
> Subject: Memory leak associated with xc_map_foreign_batch?
> 
> I running a modified Xen x86_64 based on xen-unstable changeset
> f80cf52a4fb6, linux-2.6.18-xen changset 271d9b9bee40. (Roughly 3.4.0-
> rc4-pre)
> 
> I''m running a process that loops using xc_map_foreign_batch() to
map
> bunch of pages from a couple of domains, compares some of them, and
> then calls munmap() on the regions. /proc/meminfo shows a few extra K
> turning up as Pagetables every 10 seconds or so and the machine
> eventually runs out of memory and the OOM killer fires.
> 
> I was wondering if anyone knew of a memory leak in the
> xc_map_foreign_batch()/munmap() path that might have been fixed or
> where I might look? (Or possibly what silly thing I''m doing
wrong.)
> 
> Thanks,
> 
> John Byrne

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