Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> writes: > On Tue, Jan 12, 2021 at 9:24 PM huang ying <huang.ying.caritas@xxxxxxxxx> wrote: >> > >> > Couldn't we just move it to the tail of the LRU list so it's reclaimed >> > first? Or is locking going to be a problem here? >> >> Yes. That's a way to reduce the disturbance to the page reclaiming. >> For LRU lock contention, is it sufficient to use another pagevec? > > I wonder if this is really worth it. I'd like to see numbers. > > Because in probably 99%+ of all cases, that LRU dance is only going to > hurt and add extra locking overhead and dirty caches. > > So I'd like to see some numbers that it actually helps measurably in > whatever paging-heavy case... OK. I will start from a simpler version and only use a pagevec if there's measurable difference. Best Regards, Huang, Ying
