From: Toshi Kani <toshi.kani@hpe.com>
To: mhocko@suse.com, akpm@linux-foundation.org, tglx@linutronix.de,
mingo@redhat.com, hpa@zytor.com
Cc: cpandya@codeaurora.org, linux-mm@kvack.org, x86@kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 0/3] fix free pmd/pte page handlings on x86
Date: Wed, 27 Jun 2018 08:13:45 -0600 [thread overview]
Message-ID: <20180627141348.21777-1-toshi.kani@hpe.com> (raw)
This series fixes two issues in the x86 ioremap free page handlings
for pud/pmd mappings.
Patch 01 fixes BUG_ON on x86-PAE reported by Joerg. It disables
the free page handling on x86-PAE.
Patch 02-03 fixes a possible issue with speculation which can cause
stale page-directory cache.
- Patch 02 is from Chintan's v9 01/04 patch [1], which adds a new arg
'addr', with my merge change to patch 01.
- Patch 03 adds a TLB purge (INVLPG) to purge page-structure caches
that may be cached by speculation. See the patch descriptions for
more detal.
The patches are based off from the tip tree.
[1] https://patchwork.kernel.org/patch/10371015/
v4:
- Re-wrote patch 2/3 description. (v3-UPDATE)
- Added NOTE to pud_free_pmd_page().
v3:
- Fixed a build error in v2.
v2:
- Reordered patch-set, so that patch 01 can be applied independently.
- Added a NULL pointer check for the page alloc in patch 03.
---
Toshi Kani (2):
1/3 x86/mm: disable ioremap free page handling on x86-PAE
3/3 x86/mm: add TLB purge to free pmd/pte page interfaces
Chintan Pandya (1):
2/3 ioremap: Update pgtable free interfaces with addr
---
arch/arm64/mm/mmu.c | 4 +--
arch/x86/mm/pgtable.c | 61 +++++++++++++++++++++++++++++++++++++------
include/asm-generic/pgtable.h | 8 +++---
lib/ioremap.c | 4 +--
4 files changed, 61 insertions(+), 16 deletions(-)
next reply other threads:[~2018-06-27 14:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-27 14:13 Toshi Kani [this message]
2018-06-27 14:13 ` [PATCH v4 1/3] x86/mm: disable ioremap free page handling on x86-PAE Toshi Kani
2018-06-27 14:13 ` [PATCH v4 2/3] ioremap: Update pgtable free interfaces with addr Toshi Kani
2018-06-27 15:56 ` Will Deacon
2018-06-27 16:13 ` Kani, Toshi
2018-06-29 12:23 ` Will Deacon
2018-06-29 16:01 ` Kani, Toshi
2018-07-03 21:02 ` Thomas Gleixner
2018-07-04 17:36 ` Will Deacon
2018-07-04 19:39 ` Thomas Gleixner
2018-07-05 17:16 ` Will Deacon
2018-06-27 14:13 ` [PATCH v4 3/3] x86/mm: add TLB purge to free pmd/pte page interfaces Toshi Kani
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