From: Chris Wedgwood <cw@f00f.org>
To: Leslie Donaldson <donaldlf@hermes.cs.rose-hulman.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Question: Memory change request
Date: Wed, 24 Jan 2001 21:05:00 +1300 [thread overview]
Message-ID: <20010124210500.B7029@metastasis.f00f.org> (raw)
In-Reply-To: <3A6E79EA.C2AD3806@mailhost.cs.rose-hulman.edu>
In-Reply-To: <3A6E79EA.C2AD3806@mailhost.cs.rose-hulman.edu>; from donaldlf@hermes.cs.rose-hulman.edu on Wed, Jan 24, 2001 at 12:44:58AM -0600
On Wed, Jan 24, 2001 at 12:44:58AM -0600, Leslie Donaldson wrote:
I need a block of memory that can notify me or even a flag set when
it has been written to. I was thinking of letting the user code generate
some sort of page fault... Any random thoughts would be greatly
appreciated.
mmm ... Basically dirty page logic for user space....
mprotect the page(s) you are interested in so you can't write to them
and catch SEGV -- when someone attempts to write you can pull apart
the stack frame mark the page(s) RO and continue.
if you are really stuck i think i have example code to do this
somewhere for ia32 (stack frame is arch. dependent)
--cw
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next prev parent reply other threads:[~2001-01-24 8:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-24 6:44 Leslie Donaldson
2001-01-24 8:05 ` Chris Wedgwood [this message]
2001-01-24 8:47 ` David Schwartz
2001-01-24 12:03 ` Chris Wedgwood
2001-01-25 18:48 ` Jamie Lokier
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