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Btrfs: Handle writeback under high memory pressure better

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-11-26 16:15:16 -08:00
parent eef1c494a2
commit 015a739c7c
2 changed files with 13 additions and 1 deletions
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2
fs/btrfs/extent-tree.c
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@ -961,7 +961,7 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
level = btrfs_header_level(root->node); level = btrfs_header_level(root->node);
if (num_bytes >= 96 * 1024 * 1024 && hint_byte) { if (num_bytes >= 32 * 1024 * 1024 && hint_byte) {
data = BTRFS_BLOCK_GROUP_MIXED; data = BTRFS_BLOCK_GROUP_MIXED;
} }

12
fs/btrfs/extent_map.c
View file

@ -1861,13 +1861,25 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page,
struct writeback_control *wbc) struct writeback_control *wbc)
{ {
int ret; int ret;
struct address_space *mapping = page->mapping;
struct extent_page_data epd = { struct extent_page_data epd = {
.bio = NULL, .bio = NULL,
.tree = tree, .tree = tree,
.get_extent = get_extent, .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); ret = __extent_writepage(page, wbc, &epd);
write_cache_pages(mapping, &wbc_writepages, __extent_writepage, &epd);
if (epd.bio) if (epd.bio)
submit_one_bio(WRITE, epd.bio); submit_one_bio(WRITE, epd.bio);
return ret; return ret;