From: "Marc A. Volovic" <marc@bard.org.il>
To: Pannaga Bhushan <bhushan@multitech.co.in>
Cc: linux-kernel@vger.kernel.org
Subject: Re: A hole in kernel space!
Date: Wed, 6 Nov 2002 15:49:35 +0200 [thread overview]
Message-ID: <20021106134935.GA24234@glamis.bard.org.il> (raw)
In-Reply-To: <3DC903BE.F4CD5A52@multitech.co.in>
Quoth Pannaga Bhushan:
> Hi all,
> I am looking for a setup where I need to have a certain amount
> of data always available to the kernel. The size of data I am looking at
> is abt
> 40MB(preferably, but I will settle for 20MB too) . So the normal kmalloc
I wrote a driver which steals a certain amount of memory from the kernel
and makes it available to userspace (somewhat like the rd driver).
If you want - I can send it to you.
It exports a small device hierarchy which can be read, written and
mmap'ed. The memory is contiguous. Not VERY elegant, but works quite
well.
The driver steals a certain amount of memory from the kernel at boot
time, a-la the mem= parameter. I have used "holes" of up to 1GB in size.
Marc
--
---MAV
Linguists do it cunningly
Marc A. Volovic marc@bard.org.il
next prev parent reply other threads:[~2002-11-06 13:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-06 11:57 Pannaga Bhushan
2002-11-06 12:02 ` Abraham vd Merwe
2002-11-06 12:19 ` Matti Aarnio
2002-11-06 13:49 ` Marc A. Volovic [this message]
2002-11-06 14:07 ` Richard B. Johnson
2002-11-06 16:09 ` Marc A. Volovic
2002-11-06 21:07 ` Adrian Bunk
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