On Tue, Nov 13, 2012 at 03:02:22PM +0000, Tvrtko Ursulin wrote: > On Tuesday 13 November 2012 18:40:36 Cyrill Gorcunov wrote: > > On Tue, Nov 13, 2012 at 12:37:23PM +0000, Tvrtko Ursulin wrote: > > >> Which would give about 26K of additional memory if c/r get used here. > > >> > > >> Not a big number i guess? > > > > > > I am pretty sure there are desktop file indexing packages which use > > > inotify or fanotify which will put a mark on every single directory within > > > users home. > > > > > > You probably need to test this with default installs of popular desktop > > > environments and realistic home directories. > > > > I'm about to shrink the handle down to 40/64 bytes as being proposed in one > > of early review cycles (i'll do that with patch on top), which should > > minimize the amount of memory needed (look, it's pretty clear that if the > > system uses millions of inotify watchers each inotify mark will need the > > fhandle here in c/r sake, i simply see no way at moment how to escape this > > Well I spotted uncertainty in this thread about how many of these structures > will typically be instantiated at runtime which is what I tried to add to this > discussion. I have 60k directories in my home for example... And I appreciate it, really, thanks for info! > If you don't want to use information I provided that is your choice. Because > you are still probably doubling this structure. Give or take - I haven't > actually bothered counting. > > Perhaps there could be a different way, where you could use additional space > only when it is actually used at runtime. But as I said, I am not following > closely. Unfortunatelly at moment I see no way how to make it in on-demand fashion. > > > completely, but if the c/r is turned off, which is by default, no > > additional memory needed). > > By turned on and off you are not talking about runtime but about kernel > compile time, right? Do you envisage distributions turning this on, like they > do for most things? yeah, compile time only. i don't expect it to be turned on by default sometime soon but sure distro people have own opinions. Cyrill -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
