On Thu, Jan 19, 2006 at 02:38:33PM -0600, Alan Cox wrote: > On Thu, Jan 19, 2006 at 11:14:24AM -0500, John Baldwin wrote: > [snip] > > > > Are you really sure the object's type can change or does the caller of > > vm_object_deallocate() hold some sort of reference or what not that prevents > > the type from changing? > > > > My recollection is that the object does not change type until all of > the references have been drained and it is about to be freed by > vm_object_terminate(). At the point where the type check is being > performed, the caller should hold a reference on the object. Thus, > the type should not be changing. > > That said, an unexpected type change still strikes me as the most > plausible cause. > > Is there a test that easily reproduces this problem? Racing mmap/munmap on NFS with umount -f. I'll send you the code I'm using (from ups_at_) separately. Kris
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:51 UTC