On 2018/2/9 11:58, Yunlei He wrote: > This patch remove unneed reada during build free nids. > If few nids left, three will introduce a lot of no hit > read io.
I guess it is due to be lack of commit c1fe3e981440 ("Revert "f2fs: reuse nids more aggressively""), before that commit, we will update .next_scan_nid randomly instead of updating it ascendingly, then during __build_free_nids we may readahead NAT pages starting from random position. Could try that commit to check IO again? 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