[rhelv6-list] Nasty bug with writing to resyncing RAID-5 Array

[daryl herzmann]

Howdy,

The RHEL6.3 release notes have a curious entry:

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/kernel_issues.html

   kernel component

   Due to a race condition, in certain cases, writes to RAID4/5/6 while the
   array is reconstructing could hang the system

Wow, I am reproducing it frequently here.  Simply have a RAID-5 software 
array and do some write IO to it, eventually things start hanging and the 
power button needs to be pressed.

Oh man.

daryl