On Thu 15-08-24 22:16:27, Matthew Wilcox wrote: > On Thu, Aug 15, 2024 at 07:31:43PM +0000, Roman Gushchin wrote: > > There is another subtle change here: xa_alloc() returns -EBUSY in the case > > of the address space exhaustion, while the old code returned -ENOSPC. > > It's unlikely a big practical problem. > > I decided that EBUSY was the right errno for this situation; > > #define EBUSY 16 /* Device or resource busy */ > #define ENOSPC 28 /* No space left on device */ > > ENOSPC seemed wrong; the device isn't out of space. The thing is that this is observable by userspace - mkdir would return a different and potentially unexpected errno. We can try and see whether anybody complains or just translate the error. -- Michal Hocko SUSE Labs
