linux-kernel - adjusting lowmem_reserve_ratio on an embedded system?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <200907011423.52798.daniel.kabs@gmx.de>
Date:	Wed, 1 Jul 2009 14:23:52 +0200
From:	Daniel Kabs <daniel.kabs@....de>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: adjusting lowmem_reserve_ratio on an embedded system?

Hello,

in tracing a low on memory situation on an embedded system I came across 
the Documentation/sysctl/vm.txt. There it is advised to change the 
lowmem_reserve_ratio on systems running without swap.

I wonder if this applies for an embedded system running with 256MByte RAM 
and no swap which is using only one memory zone (ZONE_NORMAL)? I guess 
no.

To understand what the parameter means I read the relevant section from 
vm.txt and came across the terms "lowmem zone" and "lower zones" 
and "lowmem memory". I feel dumb. I could not find a concept of "lower 
zones" (or "upper" zones).  What exactly do they mean?

Cheers
Daniel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/