tasks hung forever (khugepaged blocked) with 4.3 kernel

With a 4.3 kernel I compiled two days ago, I had various processes stuck in 'D' state this morning, tried to unmount filesystems, which made things worse and froze everything. In case this means anything, reading from the hard drives with dd (e.g., dd if=/dev/sda bs=4096k count=1) worked (data

tasks hung forever (khugepaged blocked) with 4.3 kernel

With a 4.3 kernel I compiled two days ago, I had various processes stuck in 'D' state this morning, tried to unmount filesystems, which made things worse and froze everything. In case this means anything, reading from the hard drives with dd (e.g., dd if=/dev/sda bs=4096k count=1) worked (data