On Mon, Mar 30, 2026 at 06:10:34PM -0400, Aaron Tomlin wrote: > Hi Jens, Keith, Christoph, Sagi, Michael, > > I have decided to drive this series forward on behalf of Daniel Wagner, the > original author. This iteration addresses the outstanding architectural and > concurrency concerns raised during the previous review cycle, and the series > has been rebased on v7.0-rc5-509-g545475aebc2a. > > Building upon prior iterations, this series introduces critical > architectural refinements to the mapping and affinity spreading algorithms > to guarantee thread safety and resilience against concurrent CPU-hotplug > operations. Previously, the block layer relied on a shared global static > mask (i.e., blk_hk_online_mask), which proved vulnerable to race conditions > during rapid hotplug events. This vulnerability was recently highlighted by > the kernel test robot, which encountered a NULL pointer dereference during > rcutorture (cpuhotplug) stress testing due to concurrent mask modification.
Can you share the bug report link? IMO, it should be solved as a backportable patch first if possible. Thanks, Ming
