From: Kinglong Mee <kinglongmee@gmail.com>
To: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
kinglongmee@gmail.com
Subject: [PATCH] nfs/blocklayout: make sure making a aligned read request
Date: Sat, 13 Feb 2016 21:51:31 +0800 [thread overview]
Message-ID: <56BF34E3.1020003@gmail.com> (raw)
Only treat write goes up to the inode size as aligned request,
because it always write PAGE_CACHE_SIZE, but read a dynamic size.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
fs/nfs/blocklayout/blocklayout.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index ddd0138..8bc870e 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -743,7 +743,7 @@ bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh)
static bool
is_aligned_req(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *req, unsigned int alignment)
+ struct nfs_page *req, unsigned int alignment, bool is_write)
{
/*
* Always accept buffered writes, higher layers take care of the
@@ -758,7 +758,8 @@ is_aligned_req(struct nfs_pageio_descriptor *pgio,
if (IS_ALIGNED(req->wb_bytes, alignment))
return true;
- if (req_offset(req) + req->wb_bytes == i_size_read(pgio->pg_inode)) {
+ if (is_write &&
+ (req_offset(req) + req->wb_bytes == i_size_read(pgio->pg_inode))) {
/*
* If the write goes up to the inode size, just write
* the full page. Data past the inode size is
@@ -775,7 +776,7 @@ is_aligned_req(struct nfs_pageio_descriptor *pgio,
static void
bl_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
- if (!is_aligned_req(pgio, req, SECTOR_SIZE)) {
+ if (!is_aligned_req(pgio, req, SECTOR_SIZE, false)) {
nfs_pageio_reset_read_mds(pgio);
return;
}
@@ -791,7 +792,7 @@ static size_t
bl_pg_test_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
struct nfs_page *req)
{
- if (!is_aligned_req(pgio, req, SECTOR_SIZE))
+ if (!is_aligned_req(pgio, req, SECTOR_SIZE, false))
return 0;
return pnfs_generic_pg_test(pgio, prev, req);
}
@@ -824,7 +825,7 @@ bl_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
u64 wb_size;
- if (!is_aligned_req(pgio, req, PAGE_SIZE)) {
+ if (!is_aligned_req(pgio, req, PAGE_SIZE, true)) {
nfs_pageio_reset_write_mds(pgio);
return;
}
@@ -846,7 +847,7 @@ static size_t
bl_pg_test_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
struct nfs_page *req)
{
- if (!is_aligned_req(pgio, req, PAGE_SIZE))
+ if (!is_aligned_req(pgio, req, PAGE_SIZE, true))
return 0;
return pnfs_generic_pg_test(pgio, prev, req);
}
--
2.5.0
next reply other threads:[~2016-02-13 13:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-13 13:51 Kinglong Mee [this message]
2016-02-29 9:57 ` [PATCH] nfs/blocklayout: make sure making a aligned read request Christoph Hellwig
2016-02-29 12:00 ` Kinglong Mee
2016-02-29 13:34 ` Christoph Hellwig
2016-03-01 12:35 ` Kinglong Mee
2016-03-16 19:41 ` Trond Myklebust
2016-03-21 15:30 ` Christoph Hellwig
2016-03-21 18:27 ` William Dauchy
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