From: Shuvabrata Ganguly <sganguly@cse.iitkgp.ernet.in>
To: "Stephen C. Tweedie" <sct@redhat.com>, linux MM <linux-mm@kvack.org>
Subject: Re: Question about swap_in() in 2.2.16 ....
Date: Thu, 09 Nov 2000 23:23:05 -0500 [thread overview]
Message-ID: <3A0B7829.B9F33ACA@cse.iitkgp.ernet.in> (raw)
In-Reply-To: <20001108100533.C11411@redhat.com>
"Stephen C. Tweedie" wrote:
> Hi,
>
> On Wed, Nov 08, 2000 at 01:32:26AM -0500, Shuvabrata Ganguly wrote:
> >
> > after the missing page has been swapped in this bit of code is
> > executed:-
> >
> > if (!write_access || is_page_shared(page_map)) {
> > set_pte(page_table, mk_pte(page, vma->vm_page_prot));
> > return 1;
> > }
> >
> > Now this creates a read-only mapping even if the access was a "write
> > acess" ( if the page is shared ). Doesnt this mean that an additional
> > "write-protect" fault will be taken immediately when the process tries
> > to write again ?
>
> Yes.
>
Then why dont we give it a private page in the first place ?
Cheers
Joy
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next prev parent reply other threads:[~2000-11-10 4:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-08 6:32 Shuvabrata Ganguly
2000-11-08 10:05 ` Stephen C. Tweedie
2000-11-10 4:23 ` Shuvabrata Ganguly [this message]
2000-11-10 9:56 ` Stephen C. Tweedie
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