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Btrfs: O_DIRECT writes via buffered writes + invaldiate

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This reworks the btrfs O_DIRECT write code a bit.  It had always fallen
back to buffered IO and done an invalidate, but needed to be updated
for the data=ordered code.  The invalidate wasn't actually removing pages
because they were still inside an ordered extent.

This also combines the O_DIRECT/O_SYNC paths where possible, and kicks
off IO in the main btrfs_file_write loop to keep the pipe down the the
disk full as we process long writes.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-10-03 12:30:02 -04:00
parent 323ac95bce
commit cb843a6f51
3 changed files with 38 additions and 31 deletions
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3
fs/btrfs/ordered-data.c
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@@ -397,7 +397,7 @@ void btrfs_start_ordered_extent(struct inode *inode,
/*
* Used to wait on ordered extents across a large range of bytes.
*/
void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
{
u64 end;
u64 orig_end;
@@ -451,6 +451,7 @@ again:
(unsigned long long)orig_end);
goto again;
}
return 0;
}
/*