Richard Henderson <richard.hender...@linaro.org> writes:
> On 7/17/23 11:40, Alex Bennée wrote: >> Richard Henderson <richard.hender...@linaro.org> writes: >> >>> For user-only, the probe for page writability may race with another >>> thread's mprotect. Take the mmap_lock around the operation. This >>> is still faster than the start/end_exclusive fallback. >> Did we have a bug report or replication for this? > > See the comment: > >> + * We must take mmap_lock so that the query remains valid until >> + * the write is complete -- tests/tcg/multiarch/munmap-pthread.c >> + * is an example that can race. doh... > > > r~ -- Alex Bennée Virtualisation Tech Lead @ Linaro
