lkml.org 
[lkml]   [2011]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 07/10] fs: make generic file read/write functions plug
Date
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---
mm/filemap.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 380776c..f9a29c8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1243,12 +1243,15 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long seg = 0;
size_t count;
loff_t *ppos = &iocb->ki_pos;
+ struct blk_plug plug;

count = 0;
retval = generic_segment_checks(iov, &nr_segs, &count, VERIFY_WRITE);
if (retval)
return retval;

+ blk_start_plug(&plug);
+
/* coalesce the iovecs and go direct-to-BIO for O_DIRECT */
if (filp->f_flags & O_DIRECT) {
loff_t size;
@@ -1321,6 +1324,7 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
break;
}
out:
+ blk_finish_plug(&plug);
return retval;
}
EXPORT_SYMBOL(generic_file_aio_read);
@@ -2432,11 +2436,13 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
+ struct blk_plug plug;
ssize_t ret;

BUG_ON(iocb->ki_pos != pos);

mutex_lock(&inode->i_mutex);
+ blk_start_plug(&plug);
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
mutex_unlock(&inode->i_mutex);

@@ -2447,6 +2453,7 @@ ssize_t generic_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (err < 0 && ret > 0)
ret = err;
}
+ blk_finish_plug(&plug);
return ret;
}
EXPORT_SYMBOL(generic_file_aio_write);
--
1.7.3.2.146.gca209


\
 
 \ /
  Last update: 2011-01-22 02:21    [W:0.459 / U:0.052 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site