[cfe-dev] ld taking too much memory to link clang

[Andre Cunha]

It makes sense for me that the kernel might be killing the wrong process
when ld makes the system run out of memory. Searching the Web about the
OOM-killer, I found this (from http://linux-mm.org/OOM_Killer):

*Any particular process leader may be immunized against the oom killer if
the value of its /proc/<pid>/oom_adj is set to the constant OOM_DISABLE
(currently defined as -17). *

I'll try linking clang again and checking if OOM-killing is disabled for
ld. If so, I believe this is likely to be the reason for the problem.


On 22 January 2013 16:24, Karen Shaeffer <shaeffer at neuralscape.com> wrote:

> On Tue, Jan 22, 2013 at 02:39:20PM +0000, Renato Golin Linaro wrote:
> > Gold in my case is still not helping, since I leave many programs open at
> > once and swap gets crazy in the last linking steps of the debug
> binaries...
> >
> > Funny, though, that it starts swapping before it actually hits the
> maximum
> > memory, and I think that's why Linux is not killing the process just yet,
> > but it is flogging the usability of the desktop.
> >
> > --renato
>
> Hi,
> The kernel reserves a chunk of memory for itself as working space to dig
> out
> of an out-of-memory situation. So it will swap before running out of
> memory,
> especially if there is a large spike in memory usage at that point where
> out-of-memory is approached.
>
> This out-of-memory killer has a long history of perplexing folks, because
> it
> isn't easy to do the right thing in all cases. The kernel might be killing
> the
> wrong processes? Something to verify one way or the other.
>
> enjoy,
> Karen
> --
> Karen Shaeffer
> Neuralscape, Mountain View, CA 94040
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>



-- 
Andre Cunha
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