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Since this is just > a debugfs interface allow userspace to be lazy and use a large value so= > we can just use the entire file. > > Without this we can end up wasting cycles looking for folios which > just don't exist for no good reason. > > Signed-off-by: Luis Chamberlain > --- > mm/huge_memory.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/mm/huge_memory.c b/mm/huge_memory.c > index 8386d24a163e..86a8c7b3b8dc 100644 > --- a/mm/huge_memory.c > +++ b/mm/huge_memory.c > @@ -3535,7 +3535,7 @@ static int split_huge_pages_in_file(const char *f= ile_path, pgoff_t off_start, > struct file *candidate; > struct address_space *mapping; > int ret =3D -EINVAL; > - pgoff_t index; > + pgoff_t index, fsize; > int nr_pages =3D 1; > unsigned long total =3D 0, split =3D 0; > > @@ -3547,11 +3547,14 @@ static int split_huge_pages_in_file(const char = *file_path, pgoff_t off_start, > if (IS_ERR(candidate)) > goto out; > > + mapping =3D candidate->f_mapping; > + fsize =3D i_size_read(mapping->host); > + if (off_end > fsize) > + off_end =3D fsize; > + > pr_debug("split file-backed THPs in file: %s, page offset: [0x%lx - 0= x%lx]\n", > file_path, off_start, off_end); > > - mapping =3D candidate->f_mapping; > - > for (index =3D off_start; index < off_end; index +=3D nr_pages) { > struct folio *folio =3D filemap_get_folio(mapping, index); LGTM. Reviewed-by: Zi Yan -- Best Regards, Yan, Zi --=_MailMate_93DFCBEB-B9E7-4EDC-8EDC-CFB367B75CC1_= Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQJDBAEBCgAtFiEE6rR4j8RuQ2XmaZol4n+egRQHKFQFAmYprEAPHHppeUBudmlk aWEuY29tAAoJEOJ/noEUByhUoa0QAJFvYFTTzizyPC8tlq87XYVxqPXn+BTz6K1B m86NEIR3LxM59xEwGbmT/ReMR628Qs4nj9S86v5WGN09NaPyArNQcOoW9PR9NZD0 II/ldsGg7U7xrev80vfyRIQ+VUZutz8Oaoe41OfmGAMrp/5S2Kpz73knf2Zxd7KN M71TQlzwJntdx+XK+alQnJj4UcgyMq3HMvA6Yr2lmgQ85Et7LWrCgo5W3oovz+n5 kB57Y2JFZyZkaDKZKJIM4M7LYSuvJYxrjMVLQZi5pETSgfYYZwlul2br+KXrlAAP suV+K+VyWsTZ0rgQCHHZx1v4DLH2EBbkqQKLOfyPu/+m7PuxsKCAhTvh4PAMSz3h UvpcYLYVPWh0dsDHPhhGp7+cABwahwAsT6HC5/MfnZepBbvrHRIs+MJIpO1fv+mi qF7p7MBfwyKXSueS7MnYfEFqiQBoZNoh0PfJ7Hvw54YrzSy5uqgPr7PpZorw/mkX fj0+dgyQOJZ63FAb9pq+veqT2kCqAp9IGMnPsnZ3UWx9M0l+XlRSljhZ1IEYt+UB 2aC4kkWhyBFxQ3Y2XmUXR5quI2uifBeX8jLxOwuOUf1yNEIsXVLKvUPaWrDI4dH7 r4H3/o1r+bgLhU0ZRjqdYvAy7CpauZcQNL0Z2Rt/FArZ1ph/QKB8JfgHaLKDhY7B 8WPHmg6D =CPe/ -----END PGP SIGNATURE----- --=_MailMate_93DFCBEB-B9E7-4EDC-8EDC-CFB367B75CC1_=--