On Mon 16-05-22 09:47:06, Stefan Roesch wrote: > This adds async buffered write support to iomap. The support is focused > on the changes necessary to support XFS with iomap. > > Support for other filesystems might require additional changes. > > Signed-off-by: Stefan Roesch <shr@xxxxxx> > --- > fs/iomap/buffered-io.c | 21 ++++++++++++++++++++- > 1 file changed, 20 insertions(+), 1 deletion(-) > > diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c > index 1ffdc7078e7d..ceb3091f94c2 100644 > --- a/fs/iomap/buffered-io.c > +++ b/fs/iomap/buffered-io.c > @@ -580,13 +580,20 @@ static int __iomap_write_begin(const struct iomap_iter *iter, loff_t pos, > size_t from = offset_in_folio(folio, pos), to = from + len; > size_t poff, plen; > gfp_t gfp = GFP_NOFS | __GFP_NOFAIL; > + bool no_wait = (iter->flags & IOMAP_NOWAIT); > + > + if (no_wait) > + gfp = GFP_NOIO; GFP_NOIO means that direct reclaim is still allowed. Not sure whether you want to enter direct reclaim from io_uring fast path because in theory that can still sleep. GFP_NOWAIT would be a more natural choice... Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
