linux-kernel - Re: Kernel vs user memory

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

Message-ID: <21513643.post@talk.nabble.com>
Date:	Fri, 16 Jan 2009 22:42:32 -0800 (PST)
From:	sidc7 <siddhartha.chhabra@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: Kernel vs user memory


One last question, which one of the two lowmem or highmem kernel is most
commonly used on contemporary linux boxes. I am guessing highmem kernel ?

Thanks for the quick replies, helped a lot


H. Peter Anvin wrote:
> 
> sidc7 wrote:
>> If I am not mistaken, Linux kernel is a high memory kernel, hence for
>> Linux
>> kernel, nothing will be mapped to the kernel space, other than the memory
>> beyond 896MB which is the kernel's virtual address space. Am I right on
>> this?
> 
> It's a compilation option, and depends on the architecture.  What you
> described is true for an i386 kernel compiled as a highmem kernel.  On
> the other hand, a 64 bit kernel is *never* highmem.
> 
> 	-hpa
> 
> -- 
> H. Peter Anvin, Intel Open Source Technology Center
> I work for Intel.  I don't speak on their behalf.
> 
> --
> 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/
> 
> 

-- 
View this message in context: http://www.nabble.com/Kernel-vs-user-memory-tp21512362p21513643.html
Sent from the linux-kernel mailing list archive at Nabble.com.

--
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/