On Thu, Apr 21, 2011 at 08:06:25PM +0200, Milan Broz wrote: > On 04/21/2011 07:52 PM, Arno Wagner wrote: > > > > This sounds like one more problems with the Big Kernel Lock. > > The basic problem (simplified) is that some operations > > block everything while running. dm-crypt and RAID makes > > them take longer, but the problem is the blocking. > > It can be many problems, from network card driver to > nfs handling or io scheduler setting. > > For dm-crypt (kcryptd) - it doesn't not use BKL at all > and after every sector encryption it calls cond_resched() > (hinting scheduler to switch process if there is other work > even if kernel is compiled with voluntary preemption). > So it should behave correctly under load. Ah. Good to know. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@xxxxxxxxxxx GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F ---- Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
