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mm: set_page_dirty_balance() vs ->page_mkwrite()

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All the current page_mkwrite() implementations also set the page dirty. Which
results in the set_page_dirty_balance() call to _not_ call balance, because the
page is already found dirty.

This allows us to dirty a _lot_ of pages without ever hitting
balance_dirty_pages().  Not good (tm).

Force a balance call if ->page_mkwrite() was successful.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra
2007-10-08 18:54:37 +02:00
committed by Linus Torvalds
parent 3eb215de26
commit a200ee182a
3 changed files with 10 additions and 5 deletions
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4
mm/page-writeback.c
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@@ -274,9 +274,9 @@ static void balance_dirty_pages(struct address_space *mapping)
pdflush_operation(background_writeout, 0);
}
void set_page_dirty_balance(struct page *page)
void set_page_dirty_balance(struct page *page, int page_mkwrite)
{
if (set_page_dirty(page)) {
if (set_page_dirty(page) || page_mkwrite) {
struct address_space *mapping = page_mapping(page);
if (mapping)