some perfectionism involved here on my
part. In particular, it irks me to make qualitative distinctions
between bugs based on how hard to hit the timing requirements for them
are.

But yes, a large part of my motivation for writing this patch was to
prevent reasonable future changes to the rest of MM from making this a
worse bug.Bug: Performance regression in 1013af4f585f: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast raceJann Horn <jannh@google.com> undefinedLorenzo Stoakes <lorenzo.stoakes@oracle.com> undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined•_ƒÅ