From: mulyadi.santosa@gmail.com (Mulyadi Santosa)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Contents of CR3 register when a kernel thread is executed
Date: Tue, 19 Apr 2011 02:36:10 +0700 [thread overview]
Message-ID: <BANLkTinDEGct0Qeh2R19CxyQnV7ZkFYYJQ@mail.gmail.com> (raw)
In-Reply-To: <SNT111-DS18E78D5609ADC43AA1D389A7910@phx.gbl>
On 18/04/2011, limp <johnkyr83@hotmail.com> wrote:
> Hi all,
>
> I am trying to understand in what extend the PGD (page global directory)
> value stored in the CR3 register indicate the running process/thread by the
> Linux scheduler.
>
> I know that each process has its own PGD value but what I am confused about
> is the value of CR3 register when kernel threads are scheduled.
kernel thread(s) simply borrow latest scheduled process's PGD ( that
means, the entire address space)....this is done to save unneccessary
TLB flush since kernel thread operates in kernel space and that's the
same to all processes
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
next prev parent reply other threads:[~2011-04-18 19:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Acv9yv2t5DK6iTKkQTODS14CKbqf+w==>
2011-04-18 13:17 ` Contents of CR3 register when a kernel thread is executed limp
2011-04-18 19:36 ` Mulyadi Santosa [this message]
2011-04-19 12:49 ` Peter Teoh
2011-04-20 22:23 ` limp
2011-04-21 1:33 ` Dave Hylands
2011-04-21 4:15 ` Peter Teoh
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