Displaying 5 results from an estimated 5 matches for "num_written".
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num_write
2010 May 07
6
[PATCH 1/5] fs: allow short direct-io reads to be completed via buffered IO V2
V1->V2: Check to see if our current ppos is >= i_size after a short DIO read,
just in case it was actually a short read and we need to just return.
This is similar to what already happens in the write case. If we have a short
read while doing O_DIRECT, instead of just returning, fallthrough and try to
read the rest via buffered IO. BTRFS needs this because if we encounter a
compressed or
2009 Jul 06
2
[Patch v2] btrfs: use file_remove_suid() after i_mutex is held
V1 -> V2:
Move kmalloc() before mutex_lock(), suggested by Arjan.
file_remove_suid() should be called with i_mutex held,
file_update_time() too. So move them after mutex_lock().
Plus, check the return value of kmalloc().
Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Arjan <arjan@infradead.org>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Yan Zheng
2008 Jul 03
2
iozone remove_suid oops...
...d+0x1/0x50 SS:ESP
0068:e6439eac
[ 899.119427] ---[ end trace 74da89b64662263c ]---
--- [3] file.c
static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
loff_t pos;
loff_t start_pos;
ssize_t num_written = 0;
ssize_t err = 0;
int ret = 0;
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct page **pages = NULL;
int nrptrs;
struct page *pinned[2];
unsigned long first_index;
u...
2011 Jul 12
0
[PATCH] Btrfs: Remove unused variable 'last_index' in file.c
...bytes)
{
struct extent_state *cached_state = NULL;
int i;
@@ -1159,7 +1159,6 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
struct btrfs_root *root = BTRFS_I(inode)->root;
struct page **pages = NULL;
unsigned long first_index;
- unsigned long last_index;
size_t num_written = 0;
int nrptrs;
int ret = 0;
@@ -1172,7 +1171,6 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
return -ENOMEM;
first_index = pos >> PAGE_CACHE_SHIFT;
- last_index = (pos + iov_iter_count(i)) >> PAGE_CACHE_SHIFT;
while (iov_iter_count(i) > 0) {...
2011 Jun 21
19
[GIT PULL v3] Btrfs: improve write ahead log with sub transaction
I''ve been working to try to improve the write-ahead log''s performance,
and I found that the bottleneck addresses in the checksum items,
especially when we want to make a random write on a large file, e.g a 4G file.
Then a idea for this suggested by Chris is to use sub transaction ids and just
to log the part of inode that had changed since either the last log commit or
the last