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 07/11] iomap: Support THPs in read paths
Date: Mon, 24 Aug 2020 16:16:56 +0100 [thread overview]
Message-ID: <20200824151700.16097-8-willy@infradead.org> (raw)
In-Reply-To: <20200824151700.16097-1-willy@infradead.org>
Use thp_size() instead of PAGE_SIZE, offset_in_thp() instead
of offset_in_page() and bio_for_each_thp_segment_all().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
fs/iomap/buffered-io.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 9ea162617398..d14de8886d5c 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -187,7 +187,7 @@ iomap_read_end_io(struct bio *bio)
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
- bio_for_each_segment_all(bvec, bio, iter_all)
+ bio_for_each_thp_segment_all(bvec, bio, iter_all)
iomap_read_page_end_io(bvec, error);
bio_put(bio);
}
@@ -227,6 +227,16 @@ static inline bool iomap_block_needs_zeroing(struct inode *inode,
pos >= i_size_read(inode);
}
+/*
+ * Estimate the number of vectors we need based on the current page size;
+ * if we're wrong we'll end up doing an overly large allocation or needing
+ * to do a second allocation, neither of which is a big deal.
+ */
+static unsigned int iomap_nr_vecs(struct page *page, loff_t length)
+{
+ return (length + thp_size(page) - 1) >> page_shift(page);
+}
+
static loff_t
iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
struct iomap *iomap, struct iomap *srcmap)
@@ -280,7 +290,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
if (!ctx->bio || !is_contig || bio_full(ctx->bio, plen)) {
gfp_t gfp = mapping_gfp_constraint(page->mapping, GFP_KERNEL);
gfp_t orig_gfp = gfp;
- int nr_vecs = (length + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ int nr_vecs = iomap_nr_vecs(page, length);
if (ctx->bio)
submit_bio(ctx->bio);
@@ -324,9 +334,9 @@ iomap_readpage(struct page *page, const struct iomap_ops *ops)
trace_iomap_readpage(page->mapping->host, 1);
- for (poff = 0; poff < PAGE_SIZE; poff += ret) {
+ for (poff = 0; poff < thp_size(page); poff += ret) {
ret = iomap_apply(inode, page_offset(page) + poff,
- PAGE_SIZE - poff, 0, ops, &ctx,
+ thp_size(page) - poff, 0, ops, &ctx,
iomap_readpage_actor);
if (ret <= 0) {
WARN_ON_ONCE(ret == 0);
@@ -360,7 +370,8 @@ iomap_readahead_actor(struct inode *inode, loff_t pos, loff_t length,
loff_t done, ret;
for (done = 0; done < length; done += ret) {
- if (ctx->cur_page && offset_in_page(pos + done) == 0) {
+ if (ctx->cur_page &&
+ offset_in_thp(ctx->cur_page, pos + done) == 0) {
if (!ctx->cur_page_in_bio)
unlock_page(ctx->cur_page);
put_page(ctx->cur_page);
--
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 ` [PATCH 04/11] block: Add bio_for_each_thp_segment_all Matthew Wilcox (Oracle)
2020-08-27 8:44 ` 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 ` Matthew Wilcox (Oracle) [this message]
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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