> I am using pclinuxos and "uname -a" gives: > Linux mtz 3.2.18-pclos2.bfs #1 SMP PREEMPT Thu May 24 04:44:50 CEST > 2012 i686 i686 i386 GNU/Linux > > Using this kernel version: > > i created a 2GB file using dd, then i opened a plain mapper on the > file and then attempted to write 1GB of data through the mapper using > dd and the system lock up. I tried it 3 times and it lock up 3 times. > > writing 100MB or smaller amount of data does not hang the system.It > seem the lock up occurs when a certain number of data is passed. > > is this problem known? just to add to above with test results: i created a 2GB file, then run the following commands to see where it would lock up [root@mtz ink]# cryptsetup create zzz zzz [root@mtz ink]# dd if=/dev/zero of=/dev/mapper/zzz bs=1024 count=110K 112640+0 records in 112640+0 records out 115343360 bytes (115 MB) copied, 7.15232 s, 16.1 MB/s [root@mtz ink]# dd if=/dev/zero of=/dev/mapper/zzz bs=1024 count=140K 143360+0 records in 143360+0 records out 146800640 bytes (147 MB) copied, 4.80232 s, 30.6 MB/s [root@mtz ink]# dd if=/dev/zero of=/dev/mapper/zzz bs=1024 count=200K 204800+0 records in 204800+0 records out 209715200 bytes (210 MB) copied, 9.2493 s, 22.7 MB/s [root@mtz ink]# dd if=/dev/zero of=/dev/mapper/zzz bs=1024 count=500K 512000+0 records in 512000+0 records out 524288000 bytes (524 MB) copied, 36.333 s, 14.4 MB/s [root@mtz ink]# dd if=/dev/zero of=/dev/mapper/zzz bs=1024 count=800K 819200+0 records in 819200+0 records out 838860800 bytes (839 MB) copied, 205.896 s, 4.1 MB/s The last one locked the system couple of times but it managed to succeed. I then attempted to write 900MB to /dev/mapper/zzz and the system locked up and had to hard power down two hours later.. Will appreciate if some body could do the test locally with the kernel they are using to help me pin down the problem. Would like to avoid first time experience like the one reported here in the second paragraph: http://www.pclinuxos.com/forum/index.php/topic,106847.msg912803.html#msg912803 _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
