On Thu, 1 Dec 2022 15:58:11 -0800 "Darrick J. Wong" <djwong@xxxxxxxxxx> wrote: > > --- a/fs/dax.c > > +++ b/fs/dax.c > > @@ -1092,7 +1092,7 @@ static int dax_iomap_direct_access(const struct iomap *iomap, loff_t pos, > > } > > > > /** > > - * dax_iomap_cow_copy - Copy the data from source to destination before write > > + * dax_iomap_copy_around - Copy the data from source to destination before write > > * dax_iomap_copy_around - Prepare for an unaligned write to a > * shared/cow page by copying the data before and after the range to be > * written. Thanks, I added this: --- a/fs/dax.c~fsdax-zero-the-edges-if-source-is-hole-or-unwritten-fix +++ a/fs/dax.c @@ -1092,7 +1092,8 @@ out: } /** - * dax_iomap_copy_around - Copy the data from source to destination before write + * dax_iomap_copy_around - Prepare for an unaligned write to a shared/cow page + * by copying the data before and after the range to be written. * @pos: address to do copy from. * @length: size of copy operation. * @align_size: aligned w.r.t align_size (either PMD_SIZE or PAGE_SIZE) _
