From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
"Darrick J . Wong" <darrick.wong@oracle.com>,
linux-block@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 04/11] block: Add bio_for_each_thp_segment_all
Date: Mon, 24 Aug 2020 16:16:53 +0100 [thread overview]
Message-ID: <20200824151700.16097-5-willy@infradead.org> (raw)
In-Reply-To: <20200824151700.16097-1-willy@infradead.org>
Iterate once for each THP instead of once for each base page.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
include/linux/bio.h | 13 +++++++++++++
include/linux/bvec.h | 27 +++++++++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index c6d765382926..a0e104910097 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -129,12 +129,25 @@ static inline bool bio_next_segment(const struct bio *bio,
return true;
}
+static inline bool bio_next_thp_segment(const struct bio *bio,
+ struct bvec_iter_all *iter)
+{
+ if (iter->idx >= bio->bi_vcnt)
+ return false;
+
+ bvec_thp_advance(&bio->bi_io_vec[iter->idx], iter);
+ return true;
+}
+
/*
* drivers should _never_ use the all version - the bio may have been split
* before it got to the driver and the driver won't own all of it
*/
#define bio_for_each_segment_all(bvl, bio, iter) \
for (bvl = bvec_init_iter_all(&iter); bio_next_segment((bio), &iter); )
+#define bio_for_each_thp_segment_all(bvl, bio, iter) \
+ for (bvl = bvec_init_iter_all(&iter); \
+ bio_next_thp_segment((bio), &iter); )
static inline void bio_advance_iter(const struct bio *bio,
struct bvec_iter *iter, unsigned int bytes)
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index ac0c7299d5b8..ea8a37a7515b 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -162,4 +162,31 @@ static inline void bvec_advance(const struct bio_vec *bvec,
}
}
+static inline void bvec_thp_advance(const struct bio_vec *bvec,
+ struct bvec_iter_all *iter_all)
+{
+ struct bio_vec *bv = &iter_all->bv;
+ unsigned int page_size;
+
+ if (iter_all->done) {
+ bv->bv_page += thp_nr_pages(bv->bv_page);
+ page_size = thp_size(bv->bv_page);
+ bv->bv_offset = 0;
+ } else {
+ bv->bv_page = thp_head(bvec->bv_page +
+ (bvec->bv_offset >> PAGE_SHIFT));
+ page_size = thp_size(bv->bv_page);
+ bv->bv_offset = bvec->bv_offset -
+ (bv->bv_page - bvec->bv_page) * PAGE_SIZE;
+ BUG_ON(bv->bv_offset >= page_size);
+ }
+ bv->bv_len = min(page_size - bv->bv_offset,
+ bvec->bv_len - iter_all->done);
+ iter_all->done += bv->bv_len;
+
+ if (iter_all->done == bvec->bv_len) {
+ iter_all->idx++;
+ iter_all->done = 0;
+ }
+}
#endif /* __LINUX_BVEC_ITER_H */
--
2.28.0
next prev parent reply other threads:[~2020-08-24 15:25 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-24 15:16 [PATCH 00/11] iomap/fs/block patches for 5.11 Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 01/11] fs: Make page_mkwrite_check_truncate thp-aware Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 02/11] mm: Support THPs in zero_user_segments Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 03/11] mm: Zero the head page, not the tail page Matthew Wilcox (Oracle)
2020-08-24 15:16 ` Matthew Wilcox (Oracle) [this message]
2020-08-27 8:44 ` [PATCH 04/11] block: Add bio_for_each_thp_segment_all Christoph Hellwig
2020-08-31 19:48 ` Matthew Wilcox
2020-09-01 5:34 ` Christoph Hellwig
2020-09-01 13:05 ` Matthew Wilcox
2020-09-01 14:50 ` Christoph Hellwig
2020-08-24 15:16 ` [PATCH 05/11] iomap: Support THPs in iomap_adjust_read_range Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 06/11] iomap: Support THPs in invalidatepage Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 07/11] iomap: Support THPs in read paths Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 08/11] iomap: Change iomap_write_begin calling convention Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 09/11] iomap: Support THPs in write paths Matthew Wilcox (Oracle)
2020-08-24 15:16 ` [PATCH 10/11] iomap: Inline data shouldn't see THPs Matthew Wilcox (Oracle)
2020-08-24 15:17 ` [PATCH 11/11] iomap: Handle tail pages in iomap_page_mkwrite Matthew Wilcox (Oracle)
2020-08-25 10:29 ` [PATCH 00/11] iomap/fs/block patches for 5.11 William Kucharski
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