We applied 65sp6 to our clusters back in November and have been experiencing frequent abends since.

Last week, we installed all of the post SP6 patches including the winsock and libc patches. From that point on, one of the servers which runs and rsync process via TaskMaster Lite would abend *everytime* the rsync kicked off, while autoloading libc.nlm, with the following:

Abend 1 on P01: Server-5.70.06-4346: Kernel detected an attempted context switch while holding a spinlock

We backreved libc to the SP6 version and all seems well now.

David Harfst
Senior Systems Engineer - Information Systems
CMS, Inc. - http://www.cmsrtp.com