On Tue, Aug 17, 2010 at 12:41:48PM -0400, Eric Paris wrote: > On Thu, 2010-08-12 at 12:01 -0500, Rex Dieter wrote: > > kde packagers received a request to consider shipping systems with a > > higher (default) value of > > /proc/sys/fs/inotify/max_user_watches > > to allow for a better experience for noticing changes (notably when > > using nepomuk indexing of content in users' homedir). > > > > The suggested value was something like 524288 (seems the default on f13 > > is 8192). > > > > A recent kde-sig meeting discussed the topic, > > http://fedoraproject.org/wiki/SIGs/KDE/Meetings/2010-07-27 > > > > where mjg59 also agreed "It's probably justifiable to increase it". > > > > So, any comments or objections implementing this (for f14)? > > I'm not opposed to it but this does allow used to allocate and hold > kernel memory. The math is roughly 200 bytes per watch. So right now a > normal user can only allocate about 200*8192 bytes which is about 1.6M > of kernel memory. Not such a bad thing. > > Your suggestion would allow the user to allocate 200 * 524288 = 105M. > On a 64bit system this might not matter, but on a 32bit system this is a > substantial amount of the memory the kernel has. > > And these allocations are not counted against normal userspace limits. > > I'm not opposed to upping it, especially on x86_64, but maybe not quite > that high.... ideally, when an application that cares about this is installed, it could increase it via sysctl.conf That default isn't a one size fits all. Regardless of what we set it to, someone is going to want it smaller/bigger. Dave _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/kernel
