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Re: Unreclaimed swap space upon process termination?


From: Thomas Schwinge
Subject: Re: Unreclaimed swap space upon process termination?
Date: Tue, 29 Nov 2016 10:11:34 +0100
User-agent: Notmuch/0.9-125-g4686d11 (http://notmuchmail.org) Emacs/24.5.1 (x86_64-pc-linux-gnu)

Hi!

On Mon, 28 Nov 2016 19:55:20 +0100, Samuel Thibault <samuel.thibault@gnu.org> 
wrote:
> Thomas Schwinge, on Mon 28 Nov 2016 17:10:26 +0100, wrote:
> > ..., but on the new ("bad") system, the first non-sensical (huge;
> > -2147479552 is 0x80001000) vm_allocate call actually succeeds:
> 
> Yes, the userland address space is now 3G again, so it can now indeed
> allocate that much.

ACK.

> > I have not yet figured out where these vm_allocate calls and/or their
> > huge size parameters are coming from.
> 
> Probably the real source of the issue :)

Will look into that.

Early after a system reboot (second run of the executable), I ran into a
GNU Mach "panic ../vm/vm_page.c:2058: vm_page_evict: vm_page: unable to
recycle any page"; see attached.  As this is new code in GNU Mach (commit
5d1258459ad618481a4f239e8ce020bdecda1d3f "Rework pageout to handle
multiple segments"): anything you'd like me to do/preserve before
rebooting?


Grüße
 Thomas


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