From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>, linux-mm@kvack.org
Subject: [PATCH 04/14] iomap: Support THPs in iomap_adjust_read_range
Date: Wed, 14 Oct 2020 04:03:47 +0100 [thread overview]
Message-ID: <20201014030357.21898-5-willy@infradead.org> (raw)
In-Reply-To: <20201014030357.21898-1-willy@infradead.org>
Pass the struct page instead of the iomap_page so we can determine the
size of the page. Use offset_in_thp() instead of offset_in_page() and
use thp_size() instead of PAGE_SIZE. Convert the arguments to be size_t
instead of unsigned int, in case pages ever get larger than 2^31 bytes.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
fs/iomap/buffered-io.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 935468d79d9d..95ac66731297 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -82,16 +82,16 @@ iomap_page_release(struct page *page)
/*
* Calculate the range inside the page that we actually need to read.
*/
-static void
-iomap_adjust_read_range(struct inode *inode, struct iomap_page *iop,
- loff_t *pos, loff_t length, unsigned *offp, unsigned *lenp)
+static void iomap_adjust_read_range(struct inode *inode, struct page *page,
+ loff_t *pos, loff_t length, size_t *offp, size_t *lenp)
{
+ struct iomap_page *iop = to_iomap_page(page);
loff_t orig_pos = *pos;
loff_t isize = i_size_read(inode);
unsigned block_bits = inode->i_blkbits;
unsigned block_size = (1 << block_bits);
- unsigned poff = offset_in_page(*pos);
- unsigned plen = min_t(loff_t, PAGE_SIZE - poff, length);
+ size_t poff = offset_in_thp(page, *pos);
+ size_t plen = min_t(loff_t, thp_size(page) - poff, length);
unsigned first = poff >> block_bits;
unsigned last = (poff + plen - 1) >> block_bits;
@@ -129,7 +129,7 @@ iomap_adjust_read_range(struct inode *inode, struct iomap_page *iop,
* page cache for blocks that are entirely outside of i_size.
*/
if (orig_pos <= isize && orig_pos + length > isize) {
- unsigned end = offset_in_page(isize - 1) >> block_bits;
+ unsigned end = offset_in_thp(page, isize - 1) >> block_bits;
if (first <= end && last > end)
plen -= (last - end) * block_size;
@@ -253,7 +253,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
struct iomap_page *iop = iomap_page_create(inode, page);
bool same_page = false, is_contig = false;
loff_t orig_pos = pos;
- unsigned poff, plen;
+ size_t poff, plen;
sector_t sector;
if (iomap->type == IOMAP_INLINE) {
@@ -263,7 +263,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
}
/* zero post-eof blocks as the page may be mapped */
- iomap_adjust_read_range(inode, iop, &pos, length, &poff, &plen);
+ iomap_adjust_read_range(inode, page, &pos, length, &poff, &plen);
if (plen == 0)
goto done;
@@ -561,18 +561,19 @@ static int
__iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, int flags,
struct page *page, struct iomap *srcmap)
{
- struct iomap_page *iop = iomap_page_create(inode, page);
loff_t block_size = i_blocksize(inode);
loff_t block_start = pos & ~(block_size - 1);
loff_t block_end = (pos + len + block_size - 1) & ~(block_size - 1);
- unsigned from = offset_in_page(pos), to = from + len, poff, plen;
+ unsigned from = offset_in_page(pos), to = from + len;
+ size_t poff, plen;
if (PageUptodate(page))
return 0;
ClearPageError(page);
+ iomap_page_create(inode, page);
do {
- iomap_adjust_read_range(inode, iop, &block_start,
+ iomap_adjust_read_range(inode, page, &block_start,
block_end - block_start, &poff, &plen);
if (plen == 0)
break;
--
2.28.0
next prev parent reply other threads:[~2020-10-14 9:22 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-14 3:03 [PATCH 00/14] Transparent Huge Page support for XFS Matthew Wilcox (Oracle)
2020-10-14 3:03 ` [PATCH 01/14] fs: Support THPs in vfs_dedupe_file_range Matthew Wilcox (Oracle)
2020-10-14 16:12 ` Darrick J. Wong
2020-10-14 17:16 ` Matthew Wilcox
2020-10-14 3:03 ` [PATCH 02/14] fs: Make page_mkwrite_check_truncate thp-aware Matthew Wilcox (Oracle)
2020-10-14 16:17 ` Darrick J. Wong
2020-10-14 17:23 ` Matthew Wilcox
2020-10-14 3:03 ` [PATCH 03/14] iomap: Support THPs in BIO completion path Matthew Wilcox (Oracle)
2020-10-15 9:50 ` Christoph Hellwig
2020-10-14 3:03 ` Matthew Wilcox (Oracle) [this message]
2020-10-15 9:50 ` [PATCH 04/14] iomap: Support THPs in iomap_adjust_read_range Christoph Hellwig
2020-10-14 3:03 ` [PATCH 05/14] iomap: Support THPs in invalidatepage Matthew Wilcox (Oracle)
2020-10-14 16:33 ` Darrick J. Wong
2020-10-14 17:26 ` Matthew Wilcox
2020-10-14 20:00 ` Brian Foster
2020-10-14 3:03 ` [PATCH 06/14] iomap: Support THPs in iomap_is_partially_uptodate Matthew Wilcox (Oracle)
2020-10-14 3:03 ` [PATCH 07/14] iomap: Support THPs in readpage Matthew Wilcox (Oracle)
2020-10-14 16:39 ` Darrick J. Wong
2020-10-14 17:35 ` Matthew Wilcox
2020-10-14 3:03 ` [PATCH 08/14] iomap: Support THPs in readahead Matthew Wilcox (Oracle)
2020-10-15 9:52 ` Christoph Hellwig
2020-10-14 3:03 ` [PATCH 09/14] iomap: Change iomap_write_begin calling convention Matthew Wilcox (Oracle)
2020-10-14 16:47 ` Darrick J. Wong
2020-10-14 17:41 ` Matthew Wilcox
2020-10-14 18:08 ` Matthew Wilcox
2020-10-14 3:03 ` [PATCH 10/14] iomap: Handle THPs when writing to pages Matthew Wilcox (Oracle)
2020-10-14 3:03 ` [PATCH 11/14] iomap: Support THP writeback Matthew Wilcox (Oracle)
2020-10-14 3:03 ` [PATCH 12/14] iomap: Inline data shouldn't see THPs Matthew Wilcox (Oracle)
2020-10-14 3:03 ` [PATCH 13/14] iomap: Handle tail pages in iomap_page_mkwrite Matthew Wilcox (Oracle)
2020-10-14 3:03 ` [PATCH 14/14] xfs: Support THPs Matthew Wilcox (Oracle)
2020-10-14 16:51 ` Darrick J. Wong
2020-10-14 17:30 ` Matthew Wilcox
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