From 031da73fca29ebba3eea5a512746e01d52e542cd Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 12 Dec 2012 19:32:15 +1100 Subject: [PATCH] mtd: block2mtd: throttle writes by calling balance_dirty_pages_ratelimited. If you create a block2mtd device that is larger than main memory, and write to all of it, then lots of pages will be dirtied but they will never be flushed out as nothing calls any variant of balance_dirty_pages. It would be nice to call set_page_dirty_balance(), but that isn't exported, so just call balance_dirty_pages_ratelimited() directly. Signed-off-by: NeilBrown Signed-off-by: Artem Bityutskiy --- drivers/mtd/devices/block2mtd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c index 8debac9..e081bfe 100644 --- a/drivers/mtd/devices/block2mtd.c +++ b/drivers/mtd/devices/block2mtd.c @@ -62,6 +62,7 @@ static int _block2mtd_erase(struct block2mtd_dev *dev, loff_t to, size_t len) memset(page_address(page), 0xff, PAGE_SIZE); set_page_dirty(page); unlock_page(page); + balance_dirty_pages_ratelimited(mapping); break; } @@ -152,6 +153,7 @@ static int _block2mtd_write(struct block2mtd_dev *dev, const u_char *buf, memcpy(page_address(page) + offset, buf, cpylen); set_page_dirty(page); unlock_page(page); + balance_dirty_pages_ratelimited(mapping); } page_cache_release(page); -- 2.7.4