[Lustre-discuss] trying to port 1.8.5 to RH6 I'm facing Kernel panics due to an error in the handling of page->private

[Hebenstreit, Michael]

If I understand everything correctly page->private should contain either 0 or a pointer to kernel space. For reasons I can not currently comprehend sometimes the value is set to 2. llap_cast_private() then tries to access page->private->llap_magic, and naturally this leads to NULL pointer dereference 
 
this problem seems to creep up only during parallel reads/writes
 
any ideas?
anyone doing a RH6 port of the 1.8 branch (and no, 2.1 won't help me, my backends are 1.7 and can not be changed at this time)?
 
thanks
Michael
 
------------------------------------------------------------------------
Michael Hebenstreit                 Senior Cluster Architect
Intel Corporation                   Software and Services Group/HTE
2800 N Center Dr, DP3-307           Tel.:   +1 253 371 3144
WA 98327, DuPont           
UNITED STATES                       E-mail: michael.hebenstreit at intel.com