Sean Durkin wrote: > Hi, > > I just installed a new linux box with the latest Ubuntu release. On this > machine the system freezes (i.e. mouse pointer stalls, sound output > stops...) at regular intervals when data is written to partitions > encrypted using dm-crypt. I did some research and found that this used > to be a problem in Linux 2.6.4 and you either had to upgrade your kernel > or renice pdflush by hand to fix the problem. > > Ubuntu comes with kernel 2.6.17, and I checked the sources, pdflush is > niced to priority 0, so that fix shouldn't be neccessary. I tried > renicing pdflush up to +19, that did not change anything, so the problem > must be somewhere else. > > The problem does not occur when writing to non-encrypted partitions, so > I doubt it's hardware-related. > > Any ideas? Any pointers where else I should look? OK, it looks like now kjournald is the "culprit". On my old system with Linux kernel 2.6.14 it has a proces priority of 0, in this Ubuntu release it's nice'd to -5. If I re-nice it to 0, there are no more hangs. This priority setting must be new in this kernel version... Are there any complications to be expected if I just renice kjournald in my startup scripts or patch the kernel? cu, Sean --------------------------------------------------------------------- dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ To unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx For additional commands, e-mail: dm-crypt-help@xxxxxxxx
