Hi, I can reliably reproduce a complete machine lockup when compiling kernel sources with "make -j". After making some progress machine stops responding to anything (including CapsLock/NumLock switching or mouse moving) and after hard reboot nothing is left in kern.log or syslog. Only attaching a serial console gives me the following clues to what happens: [ 376.460584] INFO: task cc1:6839 blocked for more than 60 seconds. [ 376.533411] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 376.627129] INFO: task cc1:6840 blocked for more than 60 seconds. [ 376.699991] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 376.793636] INFO: task cc1:6850 blocked for more than 60 seconds. [ 376.866397] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 376.960026] INFO: task cc1:7017 blocked for more than 60 seconds. [ 377.032776] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 377.128156] INFO: task cc1:7079 blocked for more than 60 seconds. [ 377.200907] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 377.294522] INFO: task cc1:7188 blocked for more than 60 seconds. [ 377.367274] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 377.460984] INFO: task cc1:8342 blocked for more than 60 seconds. [ 377.533746] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 377.627372] INFO: task cc1:8425 blocked for more than 60 seconds. [ 377.700119] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 377.793737] INFO: task cc1:8502 blocked for more than 60 seconds. [ 377.866488] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 377.960103] INFO: task cc1:8535 blocked for more than 60 seconds. [ 378.034788] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Interesting thing is that after such hang happens, I reboot the machine and try to build again (this time with limited number of threads) I get lots of "input/output errors" from make and messages like the following in kern.log: [ 186.518188] ecryptfs_decrypt_page: Error attempting to read lower page; rc = [-4] [ 186.522951] ecryptfs_decrypt_page: Error attempting to read lower page; rc = [-4] [ 186.522955] ecryptfs_readpage: Error decrypting page; rc = [-4] [ 186.542690] Valid eCryptfs headers not found in file header region or xattr region [ 186.542694] Either the lower file is not in a valid eCryptfs format, or the key could not be retrieved. Plaintext passthrough mode is not enabled; returning -EIO (As you can guess I'm building in my home directory which is ecryptfs.) After that only doing "make distclean" allows me to compile kernel again. And note that when I build with "make -j 10" everything works fine (I have 2 CPUs with 4 cores each without hyper-threading). So is it some bug or a known bad usage of ecryptfs? Thank you, Pavel -- To unsubscribe from this list: send the line "unsubscribe ecryptfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
