2022년 8월 12일 (금) 오후 12:48, CGEL <cgel.zte@xxxxxxxxx>님이 작성: > > We have discussed related question before. See: > https://lore.kernel.org/all/Yio17pXawRuuVJFO@xxxxxxxxxxx/ > The problem is that there is no suitable place to measure pagecache thrashing > in fs level likes swap_readpage(). We have to measure it in folio_wait_bit_common(). > > If we measure swap thrashing just in swap_readpage(), we will miss pagecache > thrashing. If we measure swap thrashing in swap_readpage(), and measure > pagecache thrashing in folio_wait_bit_common(), it will be rerpeated calculation. Maybe, repeated calculation issue could be easily solved by re-entrance detection on delayacct_thrashing_start(). Thanks.
