Hi,
On Jan 16, 2007 21:03 +0900, [EMAIL PROTECTED] wrote:
1. Add new ioctl(EXT4_IOC_DEFRAG) which returns the first physical
block number of the specified file. With this ioctl, a command
gets the specified directory's.
Maybe I don't understand, but how is this different from the
Hi,
On Jan 16, 2007 21:03 +0900, [EMAIL PROTECTED] wrote:
1. Add new ioctl(EXT4_IOC_DEFRAG) which returns the first physical
block number of the specified file. With this ioctl, a command
gets the specified directory's.
Maybe I don't understand, but how is this different from the
Hi,
Thank you for your comment.
1. Add new ioctl(EXT4_IOC_DEFRAG) which returns the first physical
block number of the specified file. With this ioctl, a command
gets the specified directory's.
Maybe I don't understand, but how is this different from the long-time
FIBMAP ioctl?
I can
Hi,
+ext4_ext_replace_branches(struct inode *org_inode, struct inode *dest_inode,
+ pgoff_t from_page, pgoff_t dest_from_page,
+ pgoff_t count_page, unsigned long *delete_start) +{
+ struct ext4_ext_path *org_path = NULL;
+ struct ext4_ext_path *dest_path = NULL;
+ struct ext4_extent *oext,
Hi all,
I've updated my online defrag patches to support leaf node
which is filled with extents and has no space for new extent any more.
Any comments from reviews or tests are very welcome.
Implementation:
1. When the leaf node is filled with extents and there is no space
for additional
Search contiguous free blocks with Alex's mutil-block allocation
and allocate them for the temporary inode.
This patch applies on top of Alex's patches.
[RFC] delayed allocation, mballoc, etc
http://marc.theaimsgroup.com/?l=linux-ext4m=116493228301966w=2
Signed-off-by: Takashi Sato [EMAIL
Move the blocks on the temporary inode to the original inode
by a page.
1. Read the file data from the old blocks to the page
2. Move the block on the temporary inode to the original inode
3. Write the file data on the page into the new blocks
Signed-off-by: Takashi Sato [EMAIL PROTECTED
The defrag command. Usage is as follows:
o Put the multiple files closer together.
# e4defrag -r directory-name
o Defrag for a single file.
# e4defrag file-name
o Defrag for all files on ext4.
# e4defrag device-name
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
---
/*
* e4defrag, ext4
Hi,
On Thu, Feb 08 2007, Takashi Sato wrote:
The defrag command. Usage is as follows:
o Put the multiple files closer together.
# e4defrag -r directory-name
o Defrag for a single file.
# e4defrag file-name
o Defrag for all files on ext4.
# e4defrag device-name
Would it be possible
Search contiguous free blocks with Alex's mutil-block allocation
and allocate them for the temporary inode.
This patch applies on top of Alex's patches.
[RFC] delayed allocation, mballoc, etc
http://marc.theaimsgroup.com/?l=linux-ext4m=116493228301966w=2
Signed-off-by: Takashi Sato [EMAIL
Move lg_list to s_locality_dirty and mark lg as dirty
if nr_to_write(total page count which has not written in disk yet)
is 0 or less and lg_io is not empty in ext4_lg_sync_single_group().
This makes sure that inode is written to disk.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
---
diff -Nrup
Hi all,
I have made following changes to the previous online defrag patchset
to improve it. Note that there is no functional change.
1. Change the handling of temporary inode.
Now ext4_ext_defrag() calls ext4_new_inode()/iput() pair instead of
new_inode()/delete_ext_defrag_inode(). Because
Move the blocks on the temporary inode to the original inode
by a page.
1. Read the file data from the old blocks to the page
2. Move the block on the temporary inode to the original inode
3. Write the file data on the page into the new blocks
Signed-off-by: Takashi Sato [EMAIL PROTECTED
The defrag command. Usage is as follows:
o Put the multiple files closer together.
# e4defrag -r directory-name
o Defrag for a single file.
# e4defrag file-name
o Defrag for all files on ext4.
# e4defrag device-name
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
---
/*
* e4defrag, ext4
Hi all,
I have updated my online defrag patchset for addition of a new function.
This function is defragmentation for free space.
If filesytem has insufficient contiguous free blocks, defrag tries to move
other files to make sufficient space and reallocates the contiguous blocks
for the target
Search contiguous free blocks with Alex's mutil-block allocation
and allocate them for the temporary inode.
This patch applies on top of Alex's patches.
[RFC] delayed allocation, mballoc, etc
http://marc.theaimsgroup.com/?l=linux-ext4m=116493228301966w=2
Signed-off-by: Takashi Sato [EMAIL
Move the blocks on the temporary inode to the original inode
by a page.
1. Read the file data from the old blocks to the page
2. Move the block on the temporary inode to the original inode
3. Write the file data on the page into the new blocks
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed
- Get s_blocks_per_group and s_inodes_per_group of target filesystem.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19-rc6-git/Documentation/dontdiff -upNr
linux-2.6.19-rc6-test1/fs/ext4/balloc.c
Online
- Get free blocks distribution of the target block group to know
how many free blocks it has.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19-rc6-git/Documentation/dontdiff -upNr
Online-Defrag_linux-2.6.19-rc6
- Get all extents information of specified inode number to calculate
the combination of extents which should be moved to other block group.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19-rc6-git/Documentation
- To make contiguous free blocks, move files from the target block group
to other block group.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19-rc6-git/Documentation/dontdiff -upNr
Online-Defrag_linux-2.6.19-rc6
- Reserve the free blocks in the target area, not to be
used by other process.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19-rc6-git/Documentation/dontdiff -upNr
Online-Defrag_linux-2.6.19-rc6-git
- Release reserved blocks if defrag failed.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19-rc6-git/Documentation/dontdiff -upNr
Online-Defrag_linux-2.6.19-rc6-git-BLOCK_RELEASE/fs/ext4/extents.c
Online
- Move lg_list to s_locality_dirty in ext4_lg_sync_single_group()
to flush all of dirty inodes.
- Fix ext4_mb_new_blocks() to return err value when defrag failed.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
diff -X Online-Defrag_linux-2.6.19
device-name
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
Signed-off-by: Akira Fujita [EMAIL PROTECTED]
---
/*
* e4defrag.c - ext4 filesystem defragmenter
*/
#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE
#endif
#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE
#endif
#define
to unfreeze the filesystem
automatically after the lapse of the specified time.
Any comments are very welcome.
Signed-off-by: Takashi Sato [EMAIL PROTECTED]
---
diff -uprN -X linux-2.6.24-rc8/Documentation/dontdiff
linux-2.6.24-rc8/fs/ext3/ioctl.c linux-2.6.24-rc8-freeze/fs/ext3/ioctl.c
--- linux
Hi,
I am also wondering whether we should have system call(s) for these:
On Jan 25, 2008 12:59 PM, Takashi Sato [EMAIL PROTECTED] wrote:
+ case EXT3_IOC_FREEZE: {
+ case EXT3_IOC_THAW: {
And just convert XFS to use them too?
I think it is reasonable to implement
Hi,
What you *could* do is to start putting processes to sleep if they
attempt to write to the frozen filesystem, and then detect the
deadlock case where the process holding the file descriptor used to
freeze the filesystem gets frozen because it attempted to write to the
filesystem --- at
Hi,
Thank you for your comments.
That's inherently unsafe - you can have multiple unfreezes
running in parallel which seriously screws with the bdev semaphore
count that is used to lock the device due to doing multiple up()s
for every down.
Your timeout thingy guarantee that at some point you
Hi,
What you *could* do is to start putting processes to sleep if they
attempt to write to the frozen filesystem, and then detect the
deadlock case where the process holding the file descriptor used to
freeze the filesystem gets frozen because it attempted to write to the
filesystem --- at
Hi,
Ted wrote:
And I do agree that we probably should just implement this in
filesystem independent way, in which case all of the filesystems that
support this already have super_operations functions
write_super_lockfs() and unlockfs().
So if this is done using a new system call, there should
Hi,
P.S. Oh yeah, it should be noted that freezing at the filesystem
layer does *not* guarantee that changes to the block device aren't
happening via mmap()'ed files. The LVM needs to freeze writes the
block device level if it wants to guarantee a completely stable
snapshot image. So the
Hi,
Christoph Hellwig wrote:
On Fri, Feb 08, 2008 at 08:26:57AM -0500, Andreas Dilger wrote:
You may as well make the common ioctl the same as the XFS version,
both by number and parameters, so that applications which already
understand the XFS ioctl will work on other filesystems.
Yes. In
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