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And we need to judge whether hot_data_age_threshold exceeds the number of available blocks. Fixes: 71644dff4811 ("f2fs: add block_age-based extent cache") Signed-off-by: Yangtao Li --- fs/f2fs/sysfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index e396851a6dd1..b59595daf3ef 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -689,7 +689,10 @@ static ssize_t __sbi_store(struct f2fs_attr *a, } if (!strcmp(a->attr.name, "warm_data_age_threshold")) { - if (t == 0 || t <= sbi->hot_data_age_threshold) + block_t avail_user_block_count; + + avail_user_block_count = sbi->user_block_count - sbi->current_reserved_blocks; + if (t <= sbi->hot_data_age_threshold || t >= avail_user_block_count) return -EINVAL; if (t == *ui) return count;