From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Berg Subject: Re: Question on rhashtable in worst-case scenario. Date: Wed, 30 Mar 2016 11:14:12 +0200 Message-ID: <1459329252.2055.1.camel@sipsolutions.net> References: <56F9941A.3080501@candelatech.com> <56FAAA6D.3070806@candelatech.com> (sfid-20160329_181708_555021_6CC5B70B) Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Thomas Graf To: Ben Greear , Linux Kernel Mailing List , Herbert Xu , "linux-wireless@vger.kernel.org" , netdev Return-path: In-Reply-To: <56FAAA6D.3070806@candelatech.com> (sfid-20160329_181708_555021_6CC5B70B) Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Tue, 2016-03-29 at 09:16 -0700, Ben Greear wrote: > Looks like rhashtable has too much policy in it to properly deal with > cases where there are too many hash collisions, so I am going to work > on reverting it's use in mac80211. I'm not really all that happy with that approach - can't we fix the rhashtable? It's a pretty rare corner case that many keys really are identical and no kind of hash algorithm, but it seems much better to still deal with it than to remove the rhashtable usage and go back to hand-rolling something. johannes