David Howells
c636ebdb18
[PATCH] VFS: Destroy the dentries contributed by a superblock on unmounting ...
The attached patch destroys all the dentries attached to a superblock in one go
by:
(1) Destroying the tree rooted at s_root.
(2) Destroying every entry in the anon list, one at a time.
(3) Each entry in the anon list has its subtree consumed from the leaves
inwards.
This reduces the amount of work generic_shutdown_super() does, and avoids
iterating through the dentry_unused list.
Note that locking is almost entirely absent in the shrink_dcache_for_umount*()
functions added by this patch. This is because:
(1) at the point the filesystem calls generic_shutdown_super(), it is not
permitted to further touch the superblock's set of dentries, and nor may
it remove aliases from inodes;
(2) the dcache memory shrinker now skips dentries that are being unmounted;
and
(3) the superblock no longer has any external references through which the VFS
can reach it.
Given these points, the only locking we need to do is when we remove dentries
from the unused list and the name hashes, which we do a directory's worth at a
time.
We also don't need to guard against reference counts going to zero unexpectedly
and removing bits of the tree we're working on as nothing else can call dput().
A cut down version of dentry_iput() has been folded into
shrink_dcache_for_umount_subtree() function. Apart from not needing to unlock
things, it also doesn't need to check for inotify watches.
In this version of the patch, the complaint about a dentry still being in use
has been expanded from a single BUG_ON() and now gives much more information.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: NeilBrown <neilb@suse.de>
Acked-by: Ian Kent <raven@themaw.net>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-11 11:14:25 -07:00
[PATCH] Convert lockd to use the newer mutex instead of the older semaphore
2006-10-04 07:55:19 -07:00
[PATCH] mmc: multi sector write transfers
2006-10-06 08:53:41 -07:00
fix file specification in comments
2006-10-03 23:01:26 +02:00
[NETFILTER]: ebt_mark: add or/and/xor action support to mark target
2006-10-04 00:30:57 -07:00
[PATCH] Fix linux/nfsd/const.h for make headers_check
2006-10-04 07:55:24 -07:00
[PATCH] md: remove MAX_MD_DEVS which is an arbitrary limit
2006-10-03 08:04:18 -07:00
[PATCH] knfsd: tidy up up meaning of 'buffer size' in nfsd/sunrpc
2006-10-06 08:53:41 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] The scheduled removal of some OSS drivers
2006-10-04 07:55:32 -07:00
[PATCH] csa: convert CONFIG tag for extended accounting routines
2006-10-01 00:39:29 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] clean up unused kiocb variables
2006-10-01 00:39:29 -07:00
fix file specification in comments
2006-10-03 23:01:26 +02:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[ATM]: [lec] header indent, comment and whitespace cleanup
2006-09-29 17:13:24 -07:00
[PATCH] message types updated
2006-10-04 08:31:24 -04:00
fix file specification in comments
2006-10-03 23:01:26 +02:00
[PATCH] Document bi_sector and sector_t
2006-10-04 19:32:09 +02:00
[PATCH] bitmap: parse input from kernel and user buffers
2006-10-11 11:14:22 -07:00
[PATCH] helper function for retrieving scsi_cmd given host based block layer tag
2006-10-04 19:32:09 +02:00
[PATCH] blktrace: support for logging metadata reads
2006-09-30 20:29:43 +02:00
[PATCH] BLOCK: Make it possible to disable the block layer [try #6 ]
2006-09-30 20:52:31 +02:00
[PATCH] Add carta_random32() library routine
2006-10-11 11:14:21 -07:00
[PATCH] cdrom: add endianness annotations
2006-10-10 16:15:33 -07:00
[PATCH] __user annotations: futex
2006-10-10 15:37:22 -07:00
[PATCH] 32-bit compatibility HDIO IOCTLs
2006-10-11 11:14:22 -07:00
[PATCH] Pass sparse the lock expression given to lock annotations
2006-10-01 00:39:26 -07:00
[PATCH] vt: proper prototypes for some console functions
2006-10-03 08:04:12 -07:00
[PATCH] vt: Make vt_pid a struct pid (making it pid wrap around safe).
2006-10-02 07:57:14 -07:00
[PATCH] vt: proper prototypes for some console functions
2006-10-03 08:04:12 -07:00
[PATCH] bitmap: parse input from kernel and user buffers
2006-10-11 11:14:22 -07:00
[PATCH] cpuset: top_cpuset tracks hotplug changes to node_online_map
2006-09-29 09:18:21 -07:00
[PATCH] cramfs: make cramfs_uncompress_exit() return void
2006-09-29 09:18:20 -07:00
[PATCH] VFS: Destroy the dentries contributed by a superblock on unmounting
2006-10-11 11:14:25 -07:00
[PATCH] dccp __user annotations
2006-10-10 15:37:20 -07:00
[PATCH] Need forward decl of task_struct in linux/debug_locks.h
2006-10-04 06:45:23 -06:00
[PATCH] dm table: add target flush
2006-10-03 08:04:16 -07:00
[PATCH] dm table: add target flush
2006-10-03 08:04:16 -07:00
[PATCH] BLOCK: Make it possible to disable the block layer [try #6 ]
2006-09-30 20:52:31 +02:00
[PATCH] BLOCK: Move common FS-specific ioctls to linux/fs.h [try #6 ]
2006-09-30 20:52:28 +02:00
[PATCH] BLOCK: Move the Ext3 device ioctl compat stuff to the Ext3 driver [try #6 ]
2006-09-30 20:52:29 +02:00
[PATCH] ext4 uninline ext4_get_group_no_and_offset()
2006-10-11 11:14:18 -07:00
[PATCH] ext4: clean up comments in ext4-extents patch
2006-10-11 11:14:16 -07:00
[PATCH] ext4: blk_type from sector_t to unsigned long long
2006-10-11 11:14:18 -07:00
[PATCH] ext4: allow larger descriptor size
2006-10-11 11:14:18 -07:00
[PATCH] jbd2: sector_t conversion
2006-10-11 11:14:17 -07:00
[PATCH] fbdev: Honor the return value of device_create_file
2006-10-03 08:04:10 -07:00
[PATCH] Fix unserialized task->files changing
2006-09-29 09:18:12 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6
2006-10-04 09:06:16 -07:00
[POWERPC] Add QUICC Engine (QE) infrastructure
2006-10-04 15:24:27 +10:00
[PATCH] LIB: add gen_pool_destroy()
2006-10-02 07:57:12 -07:00
[PATCH] Generic infrastructure for acls
2006-09-29 09:18:24 -07:00
[PATCH] BLOCK: Make it possible to disable the block layer [try #6 ]
2006-09-30 20:52:31 +02:00
[PATCH] Define vsyscall cache as blob to make clearer that user space shouldn't use it
2006-09-30 01:47:55 +02:00
[PATCH] genirq: irq: generalize the check for HARDIRQ_BITS
2006-10-04 07:55:28 -07:00
fix file specification in comments
2006-10-03 23:01:26 +02:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] posix-timers: Fix clock_nanosleep() doesn't return the remaining time in compatibility mode
2006-09-29 09:18:15 -07:00
[PATCH] htirq: tidy up the htirq code
2006-10-04 07:55:30 -07:00
[PATCH] hugetlb: fix linked list corruption in unmap_hugepage_range()
2006-10-11 11:14:15 -07:00
Merge branch 'intelfb-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/intelfb-2.6
2006-09-30 09:36:56 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] Finish annotations of struct vlan_ethhdr
2006-10-10 16:15:34 -07:00
[XFRM]: BEET mode
2006-10-04 00:31:09 -07:00
[PATCH] IPC namespace - utils
2006-10-02 07:57:22 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] Consolidate check_signature
2006-10-11 11:14:23 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] fix misannotation in ioc4.h
2006-10-10 15:37:22 -07:00
[XFRM]: BEET mode
2006-10-04 00:31:09 -07:00
[PATCH] ipc: headers_check fix
2006-10-04 07:55:12 -07:00
[PATCH] IPMI: per-channel command registration
2006-10-01 00:39:23 -07:00
[XFRM]: BEET mode
2006-10-04 00:31:09 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] trivial iomem annotations: istallion
2006-10-10 15:37:22 -07:00
[PATCH] jbd2: switch blks_type from sector_t to ull
2006-10-11 11:14:18 -07:00
[PATCH] Create kallsyms_lookup_size_offset()
2006-10-03 08:03:41 -07:00
[MIPS] Remove remaining reference to ite_gpio.h from Kbuild
2006-10-04 18:06:15 +01:00
[PATCH] pr_debug: check pr_debug() arguments
2006-10-03 08:04:20 -07:00
[PATCH] Create call_usermodehelper_pipe()
2006-10-01 00:39:33 -07:00
[PATCH] kretprobe spinlock deadlock patch
2006-10-02 07:57:16 -07:00
[PATCH] maximum latency tracking infrastructure
2006-10-01 00:39:19 -07:00
[PATCH] make leds.h include relevant headers
2006-09-29 09:18:13 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] ext4: enable building of ext4
2006-10-11 11:14:15 -07:00
[PATCH] hot-add-mem x86_64: use CONFIG_MEMORY_HOTPLUG_SPARSE
2006-10-01 00:39:18 -07:00
[PATCH] hot-add-mem x86_64: fixup externs
2006-10-01 00:39:18 -07:00
[PATCH] mm: locks_freed fix
2006-10-11 11:14:19 -07:00
[PATCH] fix Module taint flags listing in Oops/panic
2006-10-11 11:14:21 -07:00
[PATCH] BLOCK: Make it possible to disable the block layer [try #6 ]
2006-09-30 20:52:31 +02:00
[PATCH] add -o flush for fat
2006-09-29 09:18:12 -07:00
[PATCH] msi: refactor and move the msi irq_chip into the arch code
2006-10-04 07:55:29 -07:00
[PATCH] Create fs/utimes.c
2006-10-01 00:39:19 -07:00
[PATCH] namespaces: incorporate fs namespace into nsproxy
2006-10-02 07:57:20 -07:00
[PATCH] include linux/types.h in linux/nbd.h
2006-10-11 11:14:24 -07:00
[PATCH] Move ncpfs 32bit compat ioctl to ncpfs
2006-10-01 00:39:23 -07:00
[NETFILTER]: add type parameter to ip_route_me_harder
2006-10-04 00:30:54 -07:00
[PATCH] Vectorize aio_read/aio_write fileop methods
2006-10-01 00:39:28 -07:00
[PATCH] bitmap: parse input from kernel and user buffers
2006-10-11 11:14:22 -07:00
[PATCH] Add SRCU-based notifier chains
2006-10-04 07:55:30 -07:00
[PATCH] IPC namespace core
2006-10-02 07:57:22 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] htirq: tidy up the htirq code
2006-10-04 07:55:30 -07:00
[MIPS] Remove IT8172-based platforms, ITE 8172G and Globespan IVR support.
2006-10-03 17:59:17 +01:00
[PATCH] Add Hypertransport capability defines
2006-10-04 07:55:29 -07:00
[PATCH] Fix typo in "syntax error if percpu macros are incorrectly used" patch
2006-10-06 08:53:41 -07:00
[PATCH] pid.h cleanup
2006-10-03 08:03:40 -07:00
[PATCH] posix-timers: Fix clock_nanosleep() doesn't return the remaining time in compatibility mode
2006-09-29 09:18:15 -07:00
fix file specification in comments
2006-10-03 23:01:26 +02:00
[PATCH] proc: modify proc_pident_lookup to be completely table driven
2006-10-02 07:57:13 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] Define struct pspace
2006-10-02 07:57:15 -07:00
[PATCH] Use decimal for PTRACE_ATTACH and PTRACE_DETACH.
2006-09-29 09:18:16 -07:00
[SCSI] raid class: handle component-add errors
2006-10-04 13:27:26 -05:00
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6 ]
2006-09-30 20:52:18 +02:00
[PATCH] rbtree: fixed reversed RB_EMPTY_NODE and rb_next/prev
2006-09-30 20:26:56 +02:00
[PATCH] RCU: CREDITS and MAINTAINERS
2006-10-04 07:55:31 -07:00
[PATCH] reiserfs: reorganize bitmap loading functions
2006-10-01 00:39:27 -07:00
[PATCH] reiserfs: on-demand bitmap loading
2006-10-01 00:39:28 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] sched: fix a kerneldoc error on is_init()
2006-10-06 08:53:41 -07:00
[PATCH] scx200_hrt: fix precedence bug manifesting as 27x clock in 1 MHz mode
2006-10-04 07:55:14 -07:00
[PATCH] fs.h: ifdef security fields
2006-09-29 09:18:11 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] Access Control Lists for tmpfs
2006-09-29 09:18:24 -07:00
[PATCH] slab: clean up leak tracking ifdefs a little bit
2006-10-04 07:55:13 -07:00
[PATCH] smbfs endianness annotations
2006-10-10 16:15:34 -07:00
[PATCH] The scheduled removal of some OSS drivers
2006-10-04 07:55:32 -07:00
[PATCH] Pass a lock expression to __cond_lock, like __acquire and __release
2006-09-29 09:18:20 -07:00
[PATCH] Make spinlock/rwlock annotations more accurate by using parameters, not types
2006-09-29 09:18:19 -07:00
[PATCH] SRCU: report out-of-memory errors
2006-10-04 07:55:30 -07:00
[PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbers
2006-10-03 08:03:40 -07:00
[PATCH] Generic boolean
2006-10-01 00:39:18 -07:00
[PATCH] kmemdup: introduce
2006-10-01 00:39:19 -07:00
[PATCH] synclink_gt: add bisync and monosync modes
2006-10-01 00:39:22 -07:00
[PATCH] epoll_pwait()
2006-10-11 11:14:21 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] csa accounting taskstats update
2006-10-01 00:39:29 -07:00
[PATCH] missing include of scatterlist.h
2006-10-08 12:32:36 -07:00
[PATCH] provide tickadj define
2006-10-06 08:53:40 -07:00
[PATCH] sched: cleanup sched_group cpu_power setup
2006-10-03 08:04:06 -07:00
[PATCH] csa: convert CONFIG tag for extended accounting routines
2006-10-01 00:39:29 -07:00
[PATCH] BLOCK: Move extern declarations out of fs/*.c into header files [try #6 ]
2006-09-30 20:52:18 +02:00
[PATCH] const struct tty_operations
2006-10-02 07:57:14 -07:00
[PATCH] Document bi_sector and sector_t
2006-10-04 19:32:09 +02:00
[PATCH] ufs endianness annotations
2006-10-10 16:15:34 -07:00
[PATCH] remove remaining errno and __KERNEL_SYSCALLS__ references
2006-10-02 07:57:23 -07:00
[PATCH] Some config.h removals
2006-10-01 00:39:34 -07:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] Create fs/utimes.c
2006-10-01 00:39:19 -07:00
[PATCH] ipc: headers_check fix
2006-10-04 07:55:12 -07:00
V4L/DVB (4673): Mark the two newer ioctls as experimental
2006-10-03 15:14:16 -03:00
[PATCH] Remove another config.h
2006-09-29 09:18:13 -07:00
[PATCH] vt: rework the console spawning variables
2006-10-02 07:57:13 -07:00
fix file specification in comments
2006-10-03 23:01:26 +02:00
[PATCH] Introduce vfs_listxattr
2006-10-09 14:20:38 -07:00
[XFRM]: BEET mode
2006-10-04 00:31:09 -07:00
c636ebdb18