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List:       user-mode-linux-user
Subject:    Re: [uml-user] about mem=nM
From:       Nix <nix () esperi ! org ! uk>
Date:       2006-06-28 14:17:30
Message-ID: 87zmfxcqkl.fsf () hades ! wkstn ! nix
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On Tue, 27 Jun 2006, Jeff Dike mused:
> On Wed, Jun 28, 2006 at 12:36:19AM +0100, Nix wrote:
>> On Wed, 28 Jun 2006, paul john uttered the following:
>> > if start um without mem=256M , it's ok , if start um with mem=256M it hangs
>> > there .report "mount devfs on /dev"
>> 
>> Do you have at least 256Mb of space free in /dev/shm?
>> 
>> (In older UMLs, pre-2.6.17, you'll need to make sure /tmp has enough
>> room. If TMPFS is set, that's used instead.)
> 
> This one will show up as a SIGBUS (signal 7) sometime after boot.  At this
> point in the boot, init is the only thing running and there's no way
> that it should have eaten 256M.

Hm, true, it's only going to allocate space that's touched.

> However, if there really is no space in /tmp (or /dev/shm), then maybe.

That doesn't seem to be the case, though: something else is wrong.

-- 
`NB: Anyone suggesting that we should say "Tibibytes" instead of
 Terabytes there will be hunted down and brutally slain.
 That is all.' --- Matthew Wilcox

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