From c61a16a701a12659e2933c5965afe8d45284146a Mon Sep 17 00:00:00 2001 From: Miao Xie Date: Mon, 4 Nov 2013 23:13:23 +0800 Subject: [PATCH] Btrfs: fix the confusion between delalloc bytes and metadata bytes In shrink_delalloc(), what we need reclaim is the metadata space, so flushing pages by to_reclaim is not reasonable, it is very likely that the pages we flush are not enough. And then we had to invoke the flush function for several times, at the worst, we need call flush_space for several times. It wasted time. We improve this problem by converting the metadata space size we need reserve to the delalloc bytes, By this way, we can flush the pages by a reasonable number. (Now we use a fixed number to do conversion, it is not flexible, maybe we can find a good way to improve it in the future.) Signed-off-by: Miao Xie Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- Reading git-format-patch failed