The patch titled
mm: balance dirty pages
has been added to the -mm tree. Its filename is
mm-balance-dirty-pages.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm: balance dirty pages
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Now that we can detect writers of shared mappings, throttle them. Avoids OOM
by surprise.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/writeback.h | 1 +
mm/memory.c | 5 +++--
mm/page-writeback.c | 10 ++++++++++
3 files changed, 14 insertions(+), 2 deletions(-)
diff -puN include/linux/writeback.h~mm-balance-dirty-pages include/linux/writeback.h
--- a/include/linux/writeback.h~mm-balance-dirty-pages
+++ a/include/linux/writeback.h
@@ -115,6 +115,7 @@ int sync_page_range(struct inode *inode,
loff_t pos, loff_t count);
int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
loff_t pos, loff_t count);
+void set_page_dirty_balance(struct page *page);
/* pdflush.c */
extern int nr_pdflush_threads; /* Global so it can be exported to sysctl
diff -puN mm/memory.c~mm-balance-dirty-pages mm/memory.c
--- a/mm/memory.c~mm-balance-dirty-pages
+++ a/mm/memory.c
@@ -48,6 +48,7 @@
#include <linux/rmap.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/writeback.h>
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
@@ -1570,7 +1571,7 @@ gotten:
unlock:
pte_unmap_unlock(page_table, ptl);
if (dirty_page) {
- set_page_dirty(dirty_page);
+ set_page_dirty_balance(dirty_page);
put_page(dirty_page);
}
return ret;
@@ -2214,7 +2215,7 @@ retry:
unlock:
pte_unmap_unlock(page_table, ptl);
if (dirty_page) {
- set_page_dirty(dirty_page);
+ set_page_dirty_balance(dirty_page);
put_page(dirty_page);
}
return ret;
diff -puN mm/page-writeback.c~mm-balance-dirty-pages mm/page-writeback.c
--- a/mm/page-writeback.c~mm-balance-dirty-pages
+++ a/mm/page-writeback.c
@@ -244,6 +244,16 @@ static void balance_dirty_pages(struct a
pdflush_operation(background_writeout, 0);
}
+void set_page_dirty_balance(struct page *page)
+{
+ if (set_page_dirty(page)) {
+ struct address_space *mapping = page_mapping(page);
+
+ if (mapping)
+ balance_dirty_pages_ratelimited(mapping);
+ }
+}
+
/**
* balance_dirty_pages_ratelimited_nr - balance dirty memory state
* @mapping: address_space which was dirtied
_
Patches currently in -mm which might be from a.p.zijlstra@xxxxxxxxx are
origin.patch
mm-tracking-shared-dirty-pages.patch
mm-balance-dirty-pages.patch
mm-msync-cleanup.patch
mm-optimize-the-new-mprotect-code-a-bit.patch
mm-small-cleanup-of-install_page.patch
mm-tracking-shared-dirty-pages-checks.patch
-
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