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logfs: commit reservations under space pressure

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Ensures we only return -ENOSPC when there really is no space.

Signed-off-by: Joern Engel <joern@logfs.org>
This commit is contained in:
Joern Engel
2010-05-04 19:41:09 +02:00
parent 20503664b0
commit 05ebad8529
3 changed files with 24 additions and 4 deletions
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12
fs/logfs/file.c
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@@ -161,7 +161,17 @@ static int logfs_writepage(struct page *page, struct writeback_control *wbc)
static void logfs_invalidatepage(struct page *page, unsigned long offset)
{
move_page_to_btree(page);
struct logfs_block *block = logfs_block(page);
if (block->reserved_bytes) {
struct super_block *sb = page->mapping->host->i_sb;
struct logfs_super *super = logfs_super(sb);
super->s_dirty_pages -= block->reserved_bytes;
block->ops->free_block(sb, block);
BUG_ON(bitmap_weight(block->alias_map, LOGFS_BLOCK_FACTOR));
} else
move_page_to_btree(page);
BUG_ON(PagePrivate(page) || page->private);
}