Hi all, I find that function pmap_remove_all for arch amd64 works with a time window between reading & clearing the PTE flags(access flag and dirty flag) and invalidating its TLB entry on other CPU. After some discussion with Li Xin(cced), I think all the processes that are using the PTE being removed should be blocked before calling pmap_remove_all, or other CPU may dirty the page but does not set the dirty flag before the TLB entry is flushed. But I can not find how to block them to call the function. I read the function vm_pageout_scan in file vm/vm_pageout.c but can not find the exact method it used. Or I just misunderstood the semantics of function pmap_remove_all ?
Thanks in advance. Regards, MingyanGuo _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
