On Sat, 28 Jun 2014 20:58:38 +0900 Jaegeuk Kim <jaeg...@kernel.org> wrote:
> If we don't check the current backing device status, balance_dirty_pages can
> fall into infinite pausing routine.
>
> This can be occurred when a lot of directories make a small number of dirty
> dentry pages including files.
>
> ...
>
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -43,6 +43,8 @@ bool available_free_memory(struct f2fs_sb_info *sbi, int
> type)
> mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 12;
> res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2);
> } else if (type == DIRTY_DENTS) {
> + if (sbi->sb->s_bdi->dirty_exceeded)
> + return false;
> mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
> res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 1);
> }
err, filesystems should not be playing around with this.
Perhaps VFS changes are needed. Please tell us much much more about
what is going on here.
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