linux-kernel - Re: cc1plus invoked oom-killer: gfp_mask=0x280da, order=0, oom

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Message-ID: <4AF1DA8D.9070009@gmail.com>
Date:	Wed, 04 Nov 2009 19:48:29 +0000
From:	Dave Korn <dave.korn.cygwin@...glemail.com>
To:	Justin Mattock <justinmattock@...il.com>
CC:	Dave Korn <dave.korn.cygwin@...glemail.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	gcc@....gnu.org, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	David Rientjes <rientjes@...washington.edu>
Subject: Re: cc1plus invoked oom-killer: gfp_mask=0x280da, order=0, oom_adj=0

Justin Mattock wrote:

> O.k. here is the info from dmesg(with the patch added)
> and what -fmem-report:

  I don't know how to read the oom dmesg, but as to the -fmem-report:

> Memory still allocated at the end of the compilation process
> Size   Allocated        Used    Overhead
> Total       7200k       5293k        104k

... what that's telling us is that there isn't a substantial leak in GCC, as
there's only 7 meg left unreclaimed by GC at the end.  I think we'll have to
wait and see what the debugger tells us; either GCC really is using that much
memory in processing the file, or there's some kind of system or kernel bug
you're running into that is causing a leak in the VMM rather than the application.

> String pool

> bytes           86k (17592186044415M overhead)

  0xFFFFFFFFFFF00000, lol, wut?  It's possible that indicates some sort of
memory corruption going on.  Maybe valgrind can help, do you have that?

    cheers,
      DaveK

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