From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
benh@kernel.crashing.org, paulus@samba.org
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [1/3] powerpc/mm/radix: Update pte update sequence for pte clear case
Date: Thu, 16 Feb 2017 16:59:47 +1100 (AEDT) [thread overview]
Message-ID: <3vP58g0xpqz9s9x@ozlabs.org> (raw)
In-Reply-To: <1486609101-5231-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On Thu, 2017-02-09 at 02:58:19 UTC, "Aneesh Kumar K.V" wrote:
> In the kernel we do follow the below sequence in different code paths.
> pte = ptep_get_clear(ptep)
> ....
> set_pte_at(ptep, pte)
>
> We do that for mremap, autonuma protection update and softdirty clearing. This
> implies our optimization to skip a tlb flush when clearing a pte update is
> not valid, because for DD1 system that followup set_pte_at will be done witout
> doing the required tlbflush. Fix that by always doing the dd1 style pte update
> irrespective of new_pte value. In a later patch we will optimize the application
> exit case.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> Tested-by: Michael Neuling <mikey@neuling.org>
Series applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/ca94573b9c69d224e50e1084a27767
cheers
prev parent reply other threads:[~2017-02-16 5:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 2:58 [PATCH 1/3] powerpc/mm/radix: Update pte update sequence for pte clear case Aneesh Kumar K.V
2017-02-09 2:58 ` [PATCH 2/3] powerpc/mm/radix: Use ptep_get_and_clear_full when clearing pte for full mm Aneesh Kumar K.V
2017-02-14 4:17 ` Michael Neuling
2017-02-09 2:58 ` [PATCH 3/3] powerpc/mm/radix: Skip ptesync in pte update helpers Aneesh Kumar K.V
2017-02-14 4:17 ` Michael Neuling
2017-02-09 3:49 ` [PATCH 1/3] powerpc/mm/radix: Update pte update sequence for pte clear case Benjamin Herrenschmidt
2017-02-09 4:15 ` Benjamin Herrenschmidt
2017-02-09 4:34 ` Aneesh Kumar K.V
2017-02-14 4:17 ` Michael Neuling
2017-02-16 5:59 ` Michael Ellerman [this message]
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=3vP58g0xpqz9s9x@ozlabs.org \
--to=patch-notifications@ellerman.id.au \
--cc=aneesh.kumar@linux.vnet.ibm.com \
--cc=benh@kernel.crashing.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=paulus@samba.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.