Latest enhancements to collect task statistics in the file buildstats.bbclass also collect task I/O statistics using procfs interface. However, it is not guaranteed the I/O counters are actually present. This depends on how the kernel was configured. If the kernel was configured without CONFIG_TASK_IO_ACCOUNTING=y, the corresponding procfs entries are missing. This has been in fact observed in the wild (Build Appliance). If we try to read the non-existent counters, we will basically hang bitbake. The attached patch file checks for missing procfs entries and avoids reading them if not present. Bitbake will also issue a one-time warning message at the start of a build.
Juro Bystricky (1): buildstats.bbclass: Don't assume /proc/<pid>/io present meta/classes/buildstats.bbclass | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) -- 1.9.1 -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
