linux-kernel - [PATCHSET 2.6.22-rc4-mm2] sysfs: make directory dentries/inodes reclaimable, take#2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1181762840495-git-send-email-htejun@gmail.com>
Date:	Thu, 14 Jun 2007 04:27:20 +0900
From:	Tejun Heo <htejun@...il.com>
To:	greg@...ah.com, dmitry.torokhov@...il.com,
	cornelia.huck@...ibm.com, oneukum@...e.de, rpurdie@...ys.net,
	stern@...land.harvard.edu, maneesh@...ibm.com,
	linux-kernel@...r.kernel.org, htejun@...il.com
Subject: [PATCHSET 2.6.22-rc4-mm2] sysfs: make directory dentries/inodes reclaimable, take#2

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

#01: make-sysfs_drop_dentry-access-inodes-using-ilookup
#02: rename-sysfs_dirent-s_type-to-s_flags-and-make-room-for-flags
#03: implement-SYSFS_FLAG_REMOVED-flag
#04: implement-sysfs_find_dirent-and-sysfs_get_dirent
#05: make-kobj-point-to-sysfs_dirent-instead-of-dentry
#06: consolidate-sysfs-spinlocks
#07: use-sysfs_mutex-to-protect-the-sysfs_dirent-tree
#08: restructure-add-remove-paths-and-fix-inode-up
#09: move-sysfs_drop_dentry-to-dir.c-and-make-it-static
#10: implement-sysfs_get_dentry
#11: make-directory-dentries-and-inodes-reclaimable

API changes...

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

Changes from the last take[L] are...

* #01 added.
* #02 and #03 splitted from the first patch of the last take.
* #06 added.  sysfs_lock isn't used as global sysfs_dirent tree lock.
   merge it with kobj_sysfs_assoc_lock.
* #07 modified to use sysfs_mutex instead of sysfs_lock to protect
  sysfs_dirent tree.  This resolves the problem Cornelia was seeing in
  the last take.
* #08 and #09 added.  This is primarily to keep the parent inode's
  timestamps and i_nlink in sync.  Code looks better after the change
  too.

I'm running stress test for several hours now and things look pretty
good.  This will save quite some amount of memory on big machines.

This patchset applies on top of 2.6.22-rc4-mm2 or

  current linux-2.6#master (a0e1d1d075cc0efe9a3ac8579bce9393d070e09f)
+ regenerated sysfs rework patchset (forgot to cc lkml when posting.
  the end result is practically the same to 2.6.22-rc4-mm2)

Thanks.

--
tejun

[L] http://thread.gmane.org/gmane.linux.kernel/535388

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/