Messages in this thread | | | Date | Fri, 10 Nov 2017 00:50:35 -0800 | From | Christoph Hellwig <> | Subject | Re: [PATCH 2/3] Improve fairness when locking the per-superblock s_anon list |
| |
On Thu, Nov 09, 2017 at 11:52:48AM -0800, Linus Torvalds wrote: > Yes, getting rid of s_anon might involve crazy things like "let's just > walk all the dentries at umount time", but honestly, that sounds > preferable. Especially if we can just then do something like > > - set a special flag in the superblock if we ever use __d_obtain_alias() > > - only scan all the dentries on umount if that flag is set. > > Hmm?
The scan would be extremely painful with our current global dcache.
But then again the global dcache isn't exactly a good idea to start with. If we had a per-sb dcache using e.g. the resizable hash table the networking people seem to be fond off your idea would work really well.
| |