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Subject[PATCHSET 2.6.22-rc2-mm1 REVIEW] sysfs: make directory dentries/inodes reclaimable
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Hello, again.

THIS PATCHSET NEEDS MORE REVIEW AND TESTING. PLEASE DO NOT APPLY YET.

This patchset makes directory dentries and inodes reclaimable and is
consisted of the following six patches.

#01: implement-sysfs-flags-and-SYSFS_FLAG_REMOVED
#02: implement-sysfs_find_dirent-and-sysfs_get_dirent
#03: make-kobj-point-to-sysfs_dirent-instead-of-dentry
#04: use-sysfs_lock-to-protect-the-sysfs_dirent-tree
#05: implement-sysfs_get_dentry
#06: make-directory-dentries-and-inodes-reclaimable

Patch #01 and #06 probably need more splitting and #04-06 definitely
need a lot more testing and review but the basic seems to work. Now
having 10k sysfs files/directories cost slightly under 9 megabytes,
which isn't too bad and makes sysfs useable on wider range of systems.

API changes...

* kobj->dentry replaced with kobj->sd as dentry can go away
* shadowed directory handling functions now take sysfs_dirent instead
of dentry

As dirent and dentry are confusing as hell, I'd like to rename
sysfs_dirent to sysfs_node or something. Any better ideas?

Please review, test, scream... :-)

This patchset is on top of

2.6.22-rc2-mm1
+ [1] sysfs-assorted-fixes patchset
+ [2] sysfs-reduce-memory-footprint-of-sysfs_dirent patchset

fs/sysfs/bin.c | 6
fs/sysfs/dir.c | 590 +++++++++++++++++++++++++++++++-----------------
fs/sysfs/file.c | 196 +++++++--------
fs/sysfs/group.c | 54 ++--
fs/sysfs/inode.c | 36 +-
fs/sysfs/mount.c | 4
fs/sysfs/symlink.c | 67 ++---
fs/sysfs/sysfs.h | 25 +-
include/linux/kobject.h | 9
include/linux/sysfs.h | 24 +
lib/kobject.c | 10
11 files changed, 603 insertions(+), 418 deletions(-)

Thanks.

--
tejun

[1] http://thread.gmane.org/gmane.linux.kernel/535372
[2] http://thread.gmane.org/gmane.linux.kernel/535379


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