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f2fs: give priority to select unpinned section for foreground GC

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Previously, during foreground GC, if victims contain data of pinned file,
it will fail migration of the data, and meanwhile i_gc_failures of that
pinned file may increase, and when it exceeds threshold, GC will unpin
the file, result in breaking pinfile's semantics.

In order to mitigate such condition, let's record and skip section which
has pinned file's data and give priority to select unpinned one.

Signed-off-by: Chao Yu <chao.yu@oppo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2022-05-06 18:30:31 +08:00
committed by Jaegeuk Kim
parent 8e285631df
commit bf123c9ddf
3 changed files with 82 additions and 14 deletions
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8
fs/f2fs/segment.c
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@@ -4657,6 +4657,13 @@ static int init_victim_secmap(struct f2fs_sb_info *sbi)
dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
if (!dirty_i->victim_secmap)
return -ENOMEM;
dirty_i->pinned_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
if (!dirty_i->pinned_secmap)
return -ENOMEM;
dirty_i->pinned_secmap_cnt = 0;
dirty_i->enable_pin_section = true;
return 0;
}
@@ -5245,6 +5252,7 @@ static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
kvfree(dirty_i->pinned_secmap);
kvfree(dirty_i->victim_secmap);
}