Hello, Sean Durkin schrieb: > 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. I am experiencing the same problem, but using Fedora Core 6 with Kernel 2.6.18-1.2849.fc6. I already had that problem with FC 5 and can not point it to a specific kernel version anymore, though I didn't have it in when I started encrypting my disk back in February or March 2006. >> 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. I thought at first of it being a hardware problem, too, that's why I didn't look at the kernel or the software in the first place. Should have done that :( >> 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... Didn't work for me. Still had those system freezes. As I am in an important phase at university right now I just can not afford to have my laptop freezing all the time, so I switched back to unencrypted partitions for now... :( I already filed a bug in Redhat's (Fedora's) Bugzilla. For the time being I hope, it will be fixed in the next kernel. Thanks for the hints, though, now I do at least know at which part of the system to look. Bye, Dominik --------------------------------------------------------------------- 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
