Re: [PATCH v5 2/3] Revert "mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio"

2021-03-23 Thread Dmitry Safonov
On 3/23/21 6:25 PM, Brian Geffon wrote: > This reverts commit cd544fd1dc9293c6702fab6effa63dac1cc67e99. > > As discussed in [1] this commit was a no-op because the mapping type was > checked in vma_to_resize before move_vma is ever called. This meant that > vm_ops->mremap() would never be called o

[PATCH v5 2/3] Revert "mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio"

2021-03-23 Thread Brian Geffon
This reverts commit cd544fd1dc9293c6702fab6effa63dac1cc67e99. As discussed in [1] this commit was a no-op because the mapping type was checked in vma_to_resize before move_vma is ever called. This meant that vm_ops->mremap() would never be called on such mappings. Furthermore, we've since expanded