Commit 44a83499 authored Jul 13, 2016 by Jaegeuk Kim

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>

parent 5f281fab

fs/f2fs/segment.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
	sm_info->rec_prefree_segments = sm_info->main_segments *		sm_info->rec_prefree_segments = sm_info->main_segments *
	DEF_RECLAIM_PREFREE_SEGMENTS / 100;		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))		if (!test_opt(sbi, LFS))
	sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;		sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
	sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;		sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;

fs/f2fs/segment.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -16,6 +16,7 @@
	#define NULL_SECNO ((unsigned int)(~0))		#define NULL_SECNO ((unsigned int)(~0))

	#define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */		#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 */		/* L: Logical segment # in volume, R: Relative segment # in main area */
	#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno)		#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno)