Hi Jaegeuk,
On 2017/2/27 9:59, Hou Pengyang wrote:
> We use has_not_enough_free_secs to check if there are enough free segments,
>
> (free_sections(sbi) + freed) <=
> (node_secs + 2 * dent_secs + imeta_secs +
> reserved_sections(sbi) + needed);
Now node SSR is enable, how can we change this condition simply as:
(free_sections(sbi) + freed) <= reserved_sections(sbi)
If dirty node pages can find SSR segment, write it in SSR mode,
or it will consume free segments, and then we do FG_GC.
Another thing is that each process has a chance to do FG_GC, it's no problem
for all normal processes, but may be not a good thing for a process within
certain limits such as lower priority, with bound cpu to do FG_GC. Maybe it
will block system for a long time. So what can we do to improve this?
Thanks.
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