From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Hugh Dickins <hughd@google.com>,
Dave Hansen <dave.hansen@intel.com>, Mel Gorman <mgorman@suse.de>,
Rik van Riel <riel@redhat.com>, Vlastimil Babka <vbabka@suse.cz>,
Christoph Lameter <cl@gentwo.org>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Steve Capper <steve.capper@linaro.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>,
Jerome Marchand <jmarchan@redhat.com>,
Sasha Levin <sasha.levin@oracle.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH 05/16] page-flags: define behavior of FS/IO-related flags on compound pages
Date: Thu, 24 Sep 2015 17:50:53 +0300 [thread overview]
Message-ID: <1443106264-78075-6-git-send-email-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <1443106264-78075-1-git-send-email-kirill.shutemov@linux.intel.com>
It seems we don't have compound page on FS/IO path currently.
Use PF_NO_COMPOUND to catch if we have.
The odd exception is PG_dirty: sound uses compound pages and maps them
with PTEs. PF_NO_COMPOUND triggers VM_BUG_ON() in set_page_dirty() on
handling shared fault. Let's use PF_HEAD for PG_dirty.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
include/linux/page-flags.h | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 26102813f0ac..63db7483c264 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -245,16 +245,16 @@ static inline int __TestClearPage##uname(struct page *page) { return 0; }
TESTSETFLAG_FALSE(uname) TESTCLEARFLAG_FALSE(uname)
__PAGEFLAG(Locked, locked, PF_NO_TAIL)
-PAGEFLAG(Error, error, PF_ANY) TESTCLEARFLAG(Error, error, PF_ANY)
+PAGEFLAG(Error, error, PF_NO_COMPOUND) TESTCLEARFLAG(Error, error, PF_NO_COMPOUND)
PAGEFLAG(Referenced, referenced, PF_ANY) TESTCLEARFLAG(Referenced, referenced, PF_ANY)
__SETPAGEFLAG(Referenced, referenced, PF_ANY)
-PAGEFLAG(Dirty, dirty, PF_ANY) TESTSCFLAG(Dirty, dirty, PF_ANY)
- __CLEARPAGEFLAG(Dirty, dirty, PF_ANY)
+PAGEFLAG(Dirty, dirty, PF_HEAD) TESTSCFLAG(Dirty, dirty, PF_HEAD)
+ __CLEARPAGEFLAG(Dirty, dirty, PF_HEAD)
PAGEFLAG(LRU, lru, PF_ANY) __CLEARPAGEFLAG(LRU, lru, PF_ANY)
PAGEFLAG(Active, active, PF_ANY) __CLEARPAGEFLAG(Active, active, PF_ANY)
TESTCLEARFLAG(Active, active, PF_ANY)
__PAGEFLAG(Slab, slab, PF_ANY)
-PAGEFLAG(Checked, checked, PF_ANY) /* Used by some filesystems */
+PAGEFLAG(Checked, checked, PF_NO_COMPOUND) /* Used by some filesystems */
PAGEFLAG(Pinned, pinned, PF_ANY) TESTSCFLAG(Pinned, pinned, PF_ANY) /* Xen */
PAGEFLAG(SavePinned, savepinned, PF_ANY); /* Xen */
PAGEFLAG(Foreign, foreign, PF_ANY); /* Xen */
@@ -280,12 +280,15 @@ PAGEFLAG(OwnerPriv1, owner_priv_1, PF_ANY)
* Only test-and-set exist for PG_writeback. The unconditional operators are
* risky: they bypass page accounting.
*/
-TESTPAGEFLAG(Writeback, writeback, PF_ANY) TESTSCFLAG(Writeback, writeback, PF_ANY)
-PAGEFLAG(MappedToDisk, mappedtodisk, PF_ANY)
+TESTPAGEFLAG(Writeback, writeback, PF_NO_COMPOUND)
+ TESTSCFLAG(Writeback, writeback, PF_NO_COMPOUND)
+PAGEFLAG(MappedToDisk, mappedtodisk, PF_NO_COMPOUND)
/* PG_readahead is only used for reads; PG_reclaim is only for writes */
-PAGEFLAG(Reclaim, reclaim, PF_ANY) TESTCLEARFLAG(Reclaim, reclaim, PF_ANY)
-PAGEFLAG(Readahead, reclaim, PF_ANY) TESTCLEARFLAG(Readahead, reclaim, PF_ANY)
+PAGEFLAG(Reclaim, reclaim, PF_NO_COMPOUND)
+ TESTCLEARFLAG(Reclaim, reclaim, PF_NO_COMPOUND)
+PAGEFLAG(Readahead, reclaim, PF_NO_COMPOUND)
+ TESTCLEARFLAG(Readahead, reclaim, PF_NO_COMPOUND)
#ifdef CONFIG_HIGHMEM
/*
@@ -401,7 +404,7 @@ static inline int PageUptodate(struct page *page)
static inline void __SetPageUptodate(struct page *page)
{
smp_wmb();
- __set_bit(PG_uptodate, &(page)->flags);
+ __set_bit(PG_uptodate, &page->flags);
}
static inline void SetPageUptodate(struct page *page)
@@ -412,7 +415,7 @@ static inline void SetPageUptodate(struct page *page)
* uptodate are actually visible before PageUptodate becomes true.
*/
smp_wmb();
- set_bit(PG_uptodate, &(page)->flags);
+ set_bit(PG_uptodate, &page->flags);
}
CLEARPAGEFLAG(Uptodate, uptodate, PF_ANY)
--
2.5.1
next prev parent reply other threads:[~2015-09-24 14:51 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-19 17:12 [PATCH 0/3] fix allmodconfig failure of avr32 Sudip Mukherjee
2015-09-19 17:12 ` [PATCH 1/3] avr32: fix build failure Sudip Mukherjee
2015-09-21 6:09 ` Hans-Christian Egtvedt
2015-09-21 6:39 ` Sudip Mukherjee
2015-09-21 7:33 ` Hans-Christian Egtvedt
2015-09-21 8:01 ` Sudip Mukherjee
2015-09-23 15:56 ` Sudip Mukherjee
2015-09-23 17:15 ` Hans-Christian Egtvedt
2015-09-24 10:23 ` Sudip Mukherjee
2015-09-19 17:12 ` [PATCH 2/3] usb: gadget: at91_udc: mention proper dependency Sudip Mukherjee
2015-09-20 16:15 ` Felipe Balbi
2015-09-21 11:10 ` Sudip Mukherjee
2015-09-23 15:52 ` Sudip Mukherjee
2015-09-30 16:04 ` Felipe Balbi
2015-09-30 16:24 ` Sudip Mukherjee
2015-09-30 16:34 ` Nicolas Ferre
2015-09-30 16:53 ` Sudip Mukherjee
2015-09-30 17:12 ` Nicolas Ferre
2015-10-01 12:56 ` Sudip Mukherjee
2015-10-01 16:12 ` Sudip Mukherjee
2015-09-19 17:12 ` [PATCH 3/3] page-flags: rectify forward declaration Sudip Mukherjee
2015-09-21 22:35 ` Andrew Morton
2015-09-22 8:56 ` Sudip Mukherjee
2015-09-24 15:27 ` Sudip Mukherjee
2015-09-24 14:50 ` [PATCH 00/16] Refreshed page-flags patchset Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 01/16] page-flags: trivial cleanup for PageTrans* helpers Kirill A. Shutemov
2015-09-24 15:44 ` Christoph Lameter
2015-09-24 14:50 ` [PATCH 02/16] page-flags: move code around Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 03/16] page-flags: introduce page flags policies wrt compound pages Kirill A. Shutemov
2015-09-25 12:29 ` Konstantin Khlebnikov
2015-09-25 19:13 ` Kirill A. Shutemov
2015-09-28 10:02 ` Konstantin Khlebnikov
2015-09-28 11:03 ` Kirill A. Shutemov
2015-09-28 11:48 ` Konstantin Khlebnikov
2015-09-28 17:51 ` Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 04/16] page-flags: define PG_locked behavior on " Kirill A. Shutemov
2015-09-24 16:08 ` Christoph Lameter
2015-09-24 20:26 ` Kirill A. Shutemov
2015-09-24 14:50 ` Kirill A. Shutemov [this message]
2015-09-24 14:50 ` [PATCH 06/16] page-flags: define behavior of LRU-related flags " Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 07/16] page-flags: define behavior SL*B-related " Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 08/16] page-flags: define behavior of Xen-related " Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 09/16] page-flags: define PG_reserved behavior " Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 10/16] page-flags: define PG_swapbacked " Kirill A. Shutemov
2015-09-24 14:50 ` [PATCH 11/16] page-flags: define PG_swapcache " Kirill A. Shutemov
2015-09-24 14:51 ` [PATCH 12/16] page-flags: define PG_mlocked " Kirill A. Shutemov
2016-04-18 19:44 ` Sasha Levin
2016-05-18 14:02 ` Kirill A. Shutemov
2015-09-24 14:51 ` [PATCH 13/16] page-flags: define PG_uncached " Kirill A. Shutemov
2015-09-24 14:51 ` [PATCH 14/16] page-flags: define PG_uptodate " Kirill A. Shutemov
2015-09-24 14:51 ` [PATCH 15/16] page-flags: look at head page if the flag is encoded in page->mapping Kirill A. Shutemov
2015-09-24 14:51 ` [PATCH 16/16] mm: sanitize page->mapping for tail pages Kirill A. Shutemov
2015-09-25 2:20 ` Jerome Glisse
2015-09-24 16:13 ` [PATCH 00/16] Refreshed page-flags patchset Christoph Lameter
2015-09-24 20:25 ` Kirill A. Shutemov
-- strict thread matches above, loose matches on Subject: below --
2015-03-19 17:08 [PATCH 00/16] Sanitize usage of ->flags and ->mapping for tail pages Kirill A. Shutemov
2015-03-19 17:08 ` [PATCH 05/16] page-flags: define behavior of FS/IO-related flags on compound pages Kirill A. Shutemov
2015-03-19 18:29 ` Dave Hansen
2015-03-19 20:02 ` Kirill A. Shutemov
2015-03-23 0:02 ` Hugh Dickins
2015-03-23 12:17 ` Kirill A. Shutemov
2015-03-24 22:54 ` Hugh Dickins
2015-03-25 10:23 ` Kirill A. Shutemov
2015-03-25 18:56 ` Hugh Dickins
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