On Thu, Mar 16, 2023 at 04:28:21PM +0100, David Hildenbrand wrote: > On 10.03.23 18:16, Nils Hartmann wrote: > > Hey, > > When used without a file pointer, EINVAL is returned. Is there a reason for this? > > You mean, using it with shared anonymous memory? (MAP_SHARED|MAP_ANON) > I assume you mean "file descriptor" not "file pointer". Yup thats what I meant. > The only reason MAP_SHARED_VALIDATE was introduced was due to MAP_SYNC, only > required for DAX. DAX does not apply to shared anonymous memory. Yeah I heard about it being introduced with MAP_SYNC. But since the manpage from mmap specifically says: 'MAP_SHARED_VALIDATE provides the same behaviour as MAP_SHARED', I didn't think it would make a difference > I guess nobody cared/cares. > Question is if we want to update the implementation (there has to be a good > reason IMHO) or simply update the man page, stating that MAP_SHARED_VALIDATE > is not supported for MAP_ANON. The only reason I can come up with, is naming consistency. But it's really a non-issue und updating the man page is definitly the saner option. > -- > Thanks, > > David / dhildenb > Best Regards, Nils
