On 02/27, heyunlei wrote: > 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)
Currently, we can't guarantee successful SSR allocation all the time. > 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? Could you please elaborate this in more detail? Thanks, > > Thanks. > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
