Displaying 1 result from an estimated 1 matches for "1118216".
2019 May 13
5
[PATCH net] vhost: don't use kmap() to log dirty pages
Vhost log dirty pages directly to a userspace bitmap through GUP and
kmap_atomic() since kernel doesn't have a set_bit_to_user()
helper. This will cause issues for the arch that has virtually tagged
caches. The way to fix is to keep using userspace virtual
address. Fortunately, futex has arch_futex_atomic_op_inuser() which
could be used for setting a bit to user.
Note there're several