From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
npiggin@gmail.com, benh@kernel.crashing.org, paulus@samba.org
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [V3, 1/6] powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit
Date: Thu, 4 Oct 2018 16:14:38 +1000 (AEST) [thread overview]
Message-ID: <42QjKB4B4lz9sjF@ozlabs.org> (raw)
In-Reply-To: <20180920180947.17893-1-aneesh.kumar@linux.ibm.com>
On Thu, 2018-09-20 at 18:09:42 UTC, "Aneesh Kumar K.V" wrote:
> With this patch we use 0x8000000000000000UL (_PAGE_PRESENT) to indicate a valid
> pgd/pud/pmd entry. We also switch the p**_present() to look at this bit.
>
> With pmd_present, we have a special case. We need to make sure we consider a
> pmd marked invalid during THP split as present. Right now we clear the
> _PAGE_PRESENT bit during a pmdp_invalidate. Inorder to consider this special
> case we add a new pte bit _PAGE_INVALID (mapped to _RPAGE_SW0). This bit is
> only used with _PAGE_PRESENT cleared. Hence we are not really losing a pte bit
> for this special case. pmd_present is also updated to look at _PAGE_INVALID.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Series applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/da7ad366b497f5fc1d4a416f168057
cheers
prev parent reply other threads:[~2018-10-04 6:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 18:09 [PATCH V3 1/6] powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit Aneesh Kumar K.V
2018-09-20 18:09 ` [PATCH V3 2/6] powerpc/mm/hugetlb/book3s: add _PAGE_PRESENT to hugepd pointer Aneesh Kumar K.V
2018-09-20 18:09 ` [PATCH V3 3/6] powerpc/mm/book3s: Check for pmd_large instead of pmd_trans_huge Aneesh Kumar K.V
2018-09-20 18:09 ` [PATCH V3 4/6] arch/powerpc/mm/hash: validate the pte entries before handling the hash fault Aneesh Kumar K.V
2018-09-20 18:09 ` [PATCH V3 5/6] powerpc/mm/thp: update pmd_trans_huge to check for pmd_present Aneesh Kumar K.V
2018-09-20 18:09 ` [PATCH V3 6/6] powerpc/mm:book3s: Enable THP migration support Aneesh Kumar K.V
2018-09-21 5:55 ` [PATCH V3 1/6] powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit Christophe LEROY
2018-09-21 10:26 ` Aneesh Kumar K.V
2018-09-21 10:52 ` Christophe LEROY
2018-10-04 6:14 ` 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=42QjKB4B4lz9sjF@ozlabs.org \
--to=patch-notifications@ellerman.id.au \
--cc=aneesh.kumar@linux.ibm.com \
--cc=benh@kernel.crashing.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=npiggin@gmail.com \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).