Some slow progress on get_user_pages()
Some slow progress on get_user_pages()
[Kernel] Posted Apr 2, 2019 0:40 UTC (Tue) by corbet
One of the surest signs that the Linux Storage, Filesystem, and Memory-Management (LSFMM) Summit is approaching is the seasonal migration of memory-management developers toward the get_user_pages() problem. This core kernel primitive is necessary for high-performance I/O to user-space memory, but its interactions with filesystems have never been reliable — or even fully specified. There are currently a couple of patch sets in circulation that are attempting to improve the situation, though a full solution still seems distant.