From: Vivek <vivekutal@gmail.com>
To: Rick Brown <rick.brown.3@gmail.com>
Cc: kernelnewbies <kernelnewbies@nl.linux.org>, linux-newbie@vger.kernel.org
Subject: Re: need for 3G/1G split
Date: Wed, 21 Mar 2007 16:08:21 +0530 [thread overview]
Message-ID: <1174473501.9500.12.camel@localhost> (raw)
In-Reply-To: <7783925d0703202115j11dbf254nc916252e4cd98e8a@mail.gmail.com>
> Why is kernel restricted to use virtual addresses of only 1 GB? Or
> what is the need to split up the virtual address space into user
> addresses and kernel addresses?
We can have 4GB for kernel and 4GB for userspace but this has a overhead
of flushing of tlb for every syscall.
You can also make the split 2/2GB but this has a problem of having less
user address space.
3/1 is a better choice.
--
Vivek Kutal
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next prev parent reply other threads:[~2007-03-21 10:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-21 4:15 need for 3G/1G split Rick Brown
2007-03-21 10:38 ` Vivek [this message]
2007-03-22 5:41 ` Sandeep Kumar
2007-03-22 5:41 ` Prasad Joshi
2007-03-22 6:35 ` Rajat Jain
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