On Thursday 06 January 2011, Shaohua Li wrote:
Subject: add metadata_incore ioctl in vfs
Add an ioctl to dump filesystem's metadata in memory in vfs. Userspace
collects
such info and uses it to do metadata readahead.
Filesystem can hook to super_operations.metadata_incore to get metadata
On Wednesday 05 January 2011 03:17:16 Shaohua Li wrote:
On Tue, 2011-01-04 at 17:40 +0800, Arnd Bergmann wrote:
Have you tried passing just a single metadata_incore_ent
at the ioctl and looping in user space? I would guess the
extra overhead of that would be small enough, but that might
On Wed, 2011-01-05 at 17:42 +0800, Arnd Bergmann wrote:
On Wednesday 05 January 2011 03:17:16 Shaohua Li wrote:
On Tue, 2011-01-04 at 17:40 +0800, Arnd Bergmann wrote:
Have you tried passing just a single metadata_incore_ent
at the ioctl and looping in user space? I would guess the
On Thursday 06 January 2011, Shaohua Li wrote:
I don't understand. adding a case statement in compat_sys_ioctl, so we will do
compat_ioctl_check_table(). If I add COMPATIBLE_IOCTL(), then the check
will success, we will go to the found_handler code path and execute
do_vfs_ioctl, which is what
On Thu, 2011-01-06 at 15:38 +0800, Arnd Bergmann wrote:
On Thursday 06 January 2011, Shaohua Li wrote:
I don't understand. adding a case statement in compat_sys_ioctl, so we will
do
compat_ioctl_check_table(). If I add COMPATIBLE_IOCTL(), then the check
will success, we will go to the
On Tuesday 04 January 2011 06:40:32 Shaohua Li wrote:
+static int ioctl_metadata_incore(struct file *filp, void __user *argp)
+{
+ struct super_block *sb = filp-f_path.dentry-d_inode-i_sb;
+ struct metadata_incore_args args;
+ struct metadata_incore_ent ent;
+ loff_t
Add an ioctl to dump filesystem's metadata in memory in vfs. Userspace collects
such info and uses it to do metadata readahead.
Filesystem can hook to super_operations.metadata_incore to get metadata in
specific approach. Next patch will give an example how to implement
.metadata_incore in btrfs.
