The patch titled
Pass IO size to batch_write() address space operation
has been added to the -mm tree. Its filename is
pass-io-size-to-batch_write-address-space-operation.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Pass IO size to batch_write() address space operation
From: Badari Pulavarty <pbadari@xxxxxxxxxx>
Pass remaining size of this IO to batch_write(). This way filesystems
could choose to allocate for the entire IO, instead of current buffer size.
I would like to use this for setting ext3 reservation window or allocating
entire extent (ext4).
Signed-off-by: Badari Pulavarty <pbadari@xxxxxxxxxx>
Cc: Vladimir Saveliev <vs@xxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Hans Reiser <reiser@xxxxxxxxxxx>
Cc: Miklos Szeredi <miklos@xxxxxxxxxx>
Cc: Nathan Scott <nathans@xxxxxxx>
Cc: Steven Whitehouse <swhiteho@xxxxxxxxxx>
Cc: Mark Fasheh <mark.fasheh@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/fs.h | 2 ++
mm/filemap.c | 1 +
2 files changed, 3 insertions(+)
diff -puN include/linux/fs.h~pass-io-size-to-batch_write-address-space-operation include/linux/fs.h
--- a/include/linux/fs.h~pass-io-size-to-batch_write-address-space-operation
+++ a/include/linux/fs.h
@@ -356,6 +356,7 @@ struct writeback_control;
* struct write_descriptor - set of write arguments
* @pos: offset from the start of the file to write to
* @count: number of bytes to write
+ * @iosize: remaining number of bytes in the IO
* @buf: pointer to data to be written
* @lru_pvec: multipage container to batch adding pages to LRU list
* @cached_page: allocated but not used on previous call
@@ -366,6 +367,7 @@ struct writeback_control;
struct write_descriptor {
loff_t pos;
size_t count;
+ size_t iosize;
char __user *buf;
struct page *cached_page;
struct pagevec *lru_pvec;
diff -puN mm/filemap.c~pass-io-size-to-batch_write-address-space-operation mm/filemap.c
--- a/mm/filemap.c~pass-io-size-to-batch_write-address-space-operation
+++ a/mm/filemap.c
@@ -2205,6 +2205,7 @@ generic_file_buffered_write(struct kiocb
do {
/* do not walk over current segment */
desc.buf = cur_iov->iov_base + iov_base;
+ desc.iosize = count;
desc.count = min(count, cur_iov->iov_len - iov_base);
if (desc.count > 0)
status = (*batch_write)(file, &desc, &copied);
_
Patches currently in -mm which might be from pbadari@xxxxxxxxxx are
pass-io-size-to-batch_write-address-space-operation.patch
vectorize-aio_read-aio_write-fileop-methods.patch
vectorize-aio_read-aio_write-fileop-methods-xfs-fix.patch
vectorize-aio_read-aio_write-fileop-methods-hypfs-fix.patch
remove-readv-writev-methods-and-use-aio_read-aio_write.patch
streamline-generic_file_-interfaces-and-filemap.patch
streamline-generic_file_-interfaces-and-filemap-ecryptfs.patch
-
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