From: "David S. Miller" <davem@redhat.com>
To: sparclinux@vger.kernel.org
Subject: Re: TLB miss handler code
Date: Wed, 21 Jan 2004 21:34:55 +0000 [thread overview]
Message-ID: <20040121133455.6dc86673.davem@redhat.com> (raw)
In-Reply-To: <Pine.GSO.4.43.0401191315430.13707-100000@gatekeeper.ececs.uc.edu>
On Wed, 21 Jan 2004 12:21:06 -0500
Ed L Cashin <ecashin@uga.edu> wrote:
> I really do not understand how it is getting the pte so fast. It
> looks like it doesn't do any locking but just performs a couple quick
> calculations to get the address of the pte.
The page tables of the current process are mapped virtually and linearlly
starting at VPTE_BASE, in this way a PTE lookup is merely computed via
VPTE_BASE + (tlb_miss_vaddr >> SHIFT).
This can, itself, cause a TLB miss, for the VPTE_BASE page table mapping,
which is serviced by the code in dtlb_backend.S.
> Incidentally, why are those fast TLB-miss handlers in
> arch/sparc64/kernel and not arch/sparc64/mm?
Bacause these handlers are included directly in the trap table.
next prev parent reply other threads:[~2004-01-21 21:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-19 18:23 TLB miss handler code Nawab Ali
2004-01-19 21:27 ` Ed L Cashin
2004-01-20 23:46 ` Ben Collins
2004-01-21 0:33 ` Nawab Ali
2004-01-21 16:41 ` David S. Miller
2004-01-21 16:43 ` Ed L Cashin
2004-01-21 17:21 ` Ed L Cashin
2004-01-21 21:34 ` David S. Miller [this message]
2004-01-21 22:11 ` Ed L Cashin
2004-01-21 23:14 ` Nawab Ali
2004-01-22 1:52 ` David S. Miller
2004-01-22 2:15 ` Ed L Cashin
2004-01-22 2:16 ` David S. Miller
2004-01-22 5:01 ` Ed L Cashin
2004-01-22 5:24 ` Ed L Cashin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040121133455.6dc86673.davem@redhat.com \
--to=davem@redhat.com \
--cc=sparclinux@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.