On 2/21/19 5:36 PM, Greg Kroah-Hartman wrote: > 4.19-stable review patch. If anyone has any objections, please let me know. >
Drop it please. It increases kernel stack up to 4-order which is above PAGE_ALLOC_COSTLY_ORDER. This changes behavior of the fork() by making it fail with -ENOMEM due of high memory fragmentation. The patch that removes KASAN_EXTRA (not in Linus's tree yet) would be a better fix for the problem.
