f2fs: add maximum prefree segments

In 1TB storage, we need to admit 22841 prefree segments, which can consume
too much segments.
This patch sets 8GB in max. prefree segments in that case.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 08f6c0be20cf44042d363ace1851f6e6575c1b7a..e87aa058f57a671e0fb5170329192e301ff17fa7 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2409,6 +2409,9 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
        sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
        sm_info->rec_prefree_segments = sm_info->main_segments *
                                        DEF_RECLAIM_PREFREE_SEGMENTS / 100;
+       if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
+               sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
+
        if (!test_opt(sbi, LFS))
                sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
        sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 57d450fb4643a709401757c2393920ad3dbca333..b33f73ec60a487c7f86d078d50c222678445683b 100644 (file)
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -16,6 +16,7 @@
 #define NULL_SECNO                     ((unsigned int)(~0))
 
 #define DEF_RECLAIM_PREFREE_SEGMENTS   5       /* 5% over total segments */
+#define DEF_MAX_RECLAIM_PREFREE_SEGMENTS       4096    /* 8GB in maximum */
 
 /* L: Logical segment # in volume, R: Relative segment # in main area */
 #define GET_L2R_SEGNO(free_i, segno)   (segno - free_i->start_segno)