From 015a739c7c238768fbfa4eea8ea2ebc1a35e7bb1 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Mon, 26 Nov 2007 16:15:16 -0800
Subject: Btrfs: Handle writeback under high memory pressure better
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---
fs/btrfs/extent_map.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
(limited to 'fs/btrfs/extent_map.c')
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index a4e9096754fc..55f272c335c6 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -1861,13 +1861,25 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page,
struct writeback_control *wbc)
{
int ret;
+ struct address_space *mapping = page->mapping;
struct extent_page_data epd = {
.bio = NULL,
.tree = tree,
.get_extent = get_extent,
};
+ struct writeback_control wbc_writepages = {
+ .bdi = wbc->bdi,
+ .sync_mode = WB_SYNC_NONE,
+ .older_than_this = NULL,
+ .nr_to_write = 64,
+ .range_start = page_offset(page) + PAGE_CACHE_SIZE,
+ .range_end = (loff_t)-1,
+ };
+
ret = __extent_writepage(page, wbc, &epd);
+
+ write_cache_pages(mapping, &wbc_writepages, __extent_writepage, &epd);
if (epd.bio)
submit_one_bio(WRITE, epd.bio);
return ret;
--
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