Commit 142349f5 authored Dec 16, 2011 by Wu Fengguang Committed by Chris Mason Dec 16, 2011

btrfs: lower the dirty balance poll interval



Tests show that the original large intervals can easily make the dirty
limit exceeded on 100 concurrent dd's. So adapt to as large as the
next check point selected by the dirty throttling algorithm.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent dc47ce90

fs/btrfs/file.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1167,6 +1167,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
		nrptrs = min((iov_iter_count(i) + PAGE_CACHE_SIZE - 1) /
		PAGE_CACHE_SIZE, PAGE_CACHE_SIZE /
		(sizeof(struct page *)));
		nrptrs = min(nrptrs, current->nr_dirtied_pause - current->nr_dirtied);
		nrptrs = max(nrptrs, 8);
		pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL);
		if (!pages)
		return -ENOMEM;