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[V14,15/18] block: always define BIO_MAX_PAGES as 256

Message ID 20190121081805.32727-16-ming.lei@redhat.com (mailing list archive)
State New, archived
Headers show
Series block: support multi-page bvec | expand

Commit Message

Ming Lei Jan. 21, 2019, 8:18 a.m. UTC
Now multi-page bvec can cover CONFIG_THP_SWAP, so we don't need to
increase BIO_MAX_PAGES for it.

CONFIG_THP_SWAP needs to split one THP into normal pages and adds
them all to one bio. With multipage-bvec, it just takes one bvec to
hold them all.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
 include/linux/bio.h | 8 --------
 1 file changed, 8 deletions(-)
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diff --git a/include/linux/bio.h b/include/linux/bio.h
index af288f6e8ab0..1d279a6ae737 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -34,15 +34,7 @@ 
 #define BIO_BUG_ON
-#if HPAGE_PMD_NR > 256
 #define BIO_MAX_PAGES		256
-#define BIO_MAX_PAGES		256
 #define bio_prio(bio)			(bio)->bi_ioprio
 #define bio_set_prio(bio, prio)		((bio)->bi_ioprio = prio)