linux-kernel - Re: Multiple instances of program sharing same text segment ?

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Message-ID: <460023F1.8060102@goop.org>
Date:	Tue, 20 Mar 2007 11:12:01 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"Ravinandan Arakali (rarakali)" <rarakali@...co.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Multiple instances of program sharing same text segment ?

Ravinandan Arakali (rarakali) wrote:
> I note that do_exec calls do_mmap to map the executable file to memory.
> But not sure what happens(w.r.t text sharing) when another instance of 
> the program is invoked. BTW, this is 2.6.10.

Yes, they will be shared.  As far as the rest of the kernel is
concerned, an mmap is an mmap is an mmap, and the pages will be shared.

    J
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