On 2019/7/22 ????11:12, Theodore Y. Ts'o wrote: > On Mon, Jul 22, 2019 at 10:16:44PM +0800, Gao Xiang wrote: >> OK, I will give a try. One point I think is how to deal with the case >> if there is already cached information when remounting as well as you said. >> >> As the first step, maybe the mount option can be defined as >> allowing/forbiding caching from now on, which can be refined later. > > Yes; possible solutions include ignoring the issue (assuming that > cached data structures that "shouldn't" be in the cache given the new > cache strategy will fall out of the cache over time), forcibly > flushing the cache when the caching strategy has changed, and of > course, forbidding caching strategy change at remount time. Okay, thanks for your kindly suggestion :) will do, hopefully resend this week (I agree less bugs with less kernel configs.). Thanks, Gao Xiang > > Cheers, > > - Ted >
