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Dave Chinner 501ab32387 xfs: use generic percpu counters for inode counter 
XFS has hand-rolled per-cpu counters for the superblock since before
there was any generic implementation. There are some warts around
the  use of them for the inode counter as the hand rolled counter is
designed to be accurate at zero, but has no specific accurracy at
any other value. This design causes problems for the maximum inode
count threshold enforcement, as there is no trigger that balances
the counters as they get close tothe maximum threshold.

Instead of designing new triggers for balancing, just replace the
handrolled per-cpu counter with a generic counter.  This enables us
to update the counter through the normal superblock modification
funtions, but rather than do that we add a xfs_mod_icount() helper
function (from Christoph Hellwig) and keep the percpu counter
outside the superblock in the struct xfs_mount.

This means we still need to initialise the per-cpu counter
specifically when we read the superblock, and vice versa when we
log/write it, but it does mean that we don't need to change any
other code.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
 		2015-02-23 21:19:28 +11:00
..
9p VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
adfs adfs: add __printf verification, fix format/argument mismatches 2014-08-08 15:57:24 -07:00
affs fs/affs/super.c: fix switch indentation 2015-02-17 14:34:53 -08:00
afs Merge branch 'for-3.20/bdi' of git://git.kernel.dk/linux-block 2015-02-12 13:50:21 -08:00
autofs4 autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation 2015-02-22 11:43:34 -05:00
befs fs/befs/linuxvfs.c: remove unnecessary casting 2015-02-17 14:34:50 -08:00
bfs fs/bfs: use bfs prefix for dump_imap 2014-08-08 15:57:24 -07:00
btrfs Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-22 17:42:14 -08:00
cachefiles Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions 2015-02-22 11:38:41 -05:00
ceph Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-22 17:42:14 -08:00
cifs Revert "locks: keep a count of locks on the flctx lists" 2015-02-16 14:32:03 -05:00
coda VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
configfs configfs: Fix potential NULL d_inode dereference 2015-02-20 04:56:43 -05:00
cramfs fs/cramfs/inode.c: use linux/uaccess.h 2014-08-08 15:57:25 -07:00
debugfs debugfs: leave freeing a symlink body until inode eviction 2015-02-22 11:38:43 -05:00
devpts
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dlm netlink: make nlmsg_end() and genlmsg_end() void 2015-01-18 01:03:45 -05:00
ecryptfs VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
efivarfs * Move efivarfs from the misc filesystem section to pseudo filesystem, 2015-01-29 19:16:40 +01:00
efs fs/efs/namei.c: return is not a function 2014-08-08 15:57:18 -07:00
exofs vfs: remove get_xip_mem 2015-02-16 17:56:03 -08:00
exportfs VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
ext2 ext2: get rid of most mentions of XIP in ext2 2015-02-16 17:56:04 -08:00
ext3 ext3: destroy sbi mutexes in put_super 2015-01-05 11:13:55 +01:00
ext4 Ext4 bug fixes for 3.20. We also reserved code points for encryption 2015-02-22 18:05:13 -08:00
f2fs Merge tag 'for-f2fs-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs 2015-02-12 19:28:50 -08:00
fat fs: fat: use MSDOS_SB macro to get msdos_sb_info 2015-02-17 14:34:51 -08:00
freevxfs
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fscache fs/fscache/object-list.c: use __seq_open_private() 2014-10-13 17:52:21 +01:00
fuse VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
gfs2 VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
hfs fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp 2014-12-10 17:41:16 -08:00
hfsplus VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
hostfs hostfs: support rename flags 2014-08-07 14:40:09 -04:00
hpfs fs/hpfs/dnode.c: fix suspect code indent 2014-08-08 15:57:22 -07:00
hppfs VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
hugetlbfs fs: remove mapping->backing_dev_info 2015-01-20 14:03:05 -07:00
isofs isofs: Fix bug in the way to check if the year is a leap year 2015-01-07 09:51:49 +01:00
jbd jbd: Deletion of an unnecessary check before the function call "iput" 2014-11-18 10:15:29 +01:00
jbd2 jbd2: complain about descriptor block checksum errors 2015-01-19 15:59:58 -05:00
jffs2 Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-22 17:42:14 -08:00
jfs Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-17 16:12:34 -08:00
kernfs kernfs: remove KERNFS_STATIC_NAME 2015-02-13 21:21:36 -08:00
lockd Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux 2015-02-12 10:39:41 -08:00
logfs fs/logfs/readwrite.c: kernel-doc warning fixes 2014-08-06 18:01:12 -07:00
minix minix zmap block counts calculation fix 2014-08-08 15:57:20 -07:00
ncpfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-17 14:56:45 -08:00
nfs NFSv4.1: Clean up bind_conn_to_session 2015-02-18 13:11:09 -08:00
nfs_common lockd: move lockd's grace period handling into its own module 2014-09-17 16:33:11 -04:00
nfsd VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
nilfs2 Merge branch 'for-3.20/bdi' of git://git.kernel.dk/linux-block 2015-02-12 13:50:21 -08:00
nls
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notify fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions 2015-02-22 11:38:42 -05:00
ntfs fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info 2015-01-20 14:03:04 -07:00
ocfs2 ocfs2: set append dio as a ro compat feature 2015-02-16 17:56:05 -08:00
omfs FS/OMFS: block number sanity check during fill_super operation 2014-10-14 02:18:22 +02:00
openpromfs
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overlayfs VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
proc procfs: fix race between symlink removals and traversals 2015-02-22 11:43:12 -05:00
pstore pstore: Fix sprintf format specifier in pstore_dump() 2015-01-16 16:01:29 -08:00
qnx4
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qnx6 fs/qnx6: update debugging to current functions 2014-08-08 15:57:26 -07:00
quota Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2015-02-10 15:52:38 -08:00
ramfs fs: remove mapping->backing_dev_info 2015-01-20 14:03:05 -07:00
reiserfs VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
romfs fs: remove mapping->backing_dev_info 2015-01-20 14:03:05 -07:00
squashfs Squashfs: Add LZ4 compression configuration option 2014-11-27 18:48:44 +00:00
sysfs driver core patches for 3.20-rc1 2015-02-15 11:11:47 -08:00
sysv
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ubifs Merge branch 'for-linus-v3.20' of git://git.infradead.org/linux-ubifs 2015-02-15 10:11:39 -08:00
udf udf: remove bool assignment to 0/1 2015-02-05 16:34:25 +01:00
ufs fs/ufs/super.c: fix potential race condition 2015-02-17 14:34:51 -08:00
xfs xfs: use generic percpu counters for inode counter 2015-02-23 21:19:28 +11:00
Kconfig dax: does not work correctly with virtual aliasing caches 2015-02-16 17:56:04 -08:00
Kconfig.binfmt fs/binfmt_som: Drop kernel support for HP-UX SOM binaries 2015-02-17 16:29:36 +01:00
Makefile Merge branch 'parisc-3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2015-02-17 14:25:58 -08:00
aio.c fs/aio.c: Remove duplicate function name in pr_debug messages 2015-02-20 04:56:44 -05:00
anon_inodes.c
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attr.c
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bad_inode.c don't bother with most of the bad_file_ops methods 2015-02-20 04:03:58 -05:00
binfmt_aout.c assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
binfmt_elf.c x86, mm/ASLR: Fix stack randomization on 64-bit systems 2015-02-19 12:21:36 +01:00
binfmt_elf_fdpic.c handle suicide on late failure exits in execve() in search_binary_handler() 2014-10-09 02:39:00 -04:00
binfmt_em86.c syscalls: implement execveat() system call 2014-12-13 12:42:51 -08:00
binfmt_flat.c
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binfmt_misc.c unfuck binfmt_misc.c (broken by commit e6084d4) 2014-12-17 08:27:14 -05:00
binfmt_script.c syscalls: implement execveat() system call 2014-12-13 12:42:51 -08:00
block_dev.c Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block 2015-02-12 14:13:23 -08:00
buffer.c fs: clarify rate limit suppressed buffer I/O errors 2014-10-21 13:55:11 -06:00
char_dev.c fs: introduce f_op->mmap_capabilities for nommu mmap support 2015-01-20 14:02:58 -07:00
compat.c vfs: make first argument of dir_context.actor typed 2014-10-31 17:48:54 -04:00
compat_binfmt_elf.c
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compat_ioctl.c
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coredump.c coredump: Fix typo in comment 2015-02-20 04:56:44 -05:00
dax.c dax: add dax_zero_page_range 2015-02-16 17:56:04 -08:00
dcache.c VFS: Split DCACHE_FILE_TYPE into regular and special types 2015-02-22 11:38:38 -05:00
dcookies.c
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direct-io.c fuse: honour max_read and max_write in direct_io mode 2014-09-26 21:16:51 -04:00
drop_caches.c vmscan: per memory cgroup slab shrinkers 2015-02-12 18:54:09 -08:00
eventfd.c eventfd: don't take the spinlock in eventfd_poll 2015-02-17 14:34:52 -08:00
eventpoll.c epoll: optimize setting task running after blocking 2015-02-13 21:21:40 -08:00
exec.c fs: create proper filename objects using getname_kernel() 2015-01-23 00:22:20 -05:00
fcntl.c vfs: renumber FMODE_NONOTIFY and add to uniqueness check 2015-01-08 15:10:52 -08:00
fhandle.c
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file.c fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0) 2014-12-10 17:41:10 -08:00
file_table.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-10-13 11:28:42 +02:00
filesystems.c
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fs-writeback.c trylock_super(): replacement for grab_super_passive() 2015-02-22 11:38:42 -05:00
fs_pin.c switch the IO-triggering parts of umount to fs_pin 2015-01-25 23:17:29 -05:00
fs_struct.c
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inode.c Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-17 16:12:34 -08:00
internal.h trylock_super(): replacement for grab_super_passive() 2015-02-22 11:38:42 -05:00
ioctl.c fsioctl.c: make generic_block_fiemap() signal-tolerant 2015-02-10 14:30:30 -08:00
libfs.c VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
locks.c locks: fix list insertion when lock is split in two 2015-02-17 17:08:23 -05:00
mbcache.c
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mount.h switch the IO-triggering parts of umount to fs_pin 2015-01-25 23:17:29 -05:00
mpage.c vfs: guard end of device for mpage interface 2014-10-09 22:25:53 -04:00
namei.c VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
namespace.c VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
no-block.c
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nsfs.c take the targets of /proc/*/ns/* symlinks to separate fs 2014-12-10 21:30:20 -05:00
open.c Merge branch 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-17 15:27:47 -08:00
pipe.c
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pnode.c mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers. 2014-12-02 10:46:50 -06:00
pnode.h
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posix_acl.c VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) 2015-02-22 11:38:41 -05:00
proc_namespace.c vfs: add support for a lazytime mount option 2015-02-05 02:45:00 -05:00
read_write.c Merge branch 'iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-02-17 15:48:33 -08:00
readdir.c vfs: make first argument of dir_context.actor typed 2014-10-31 17:48:54 -04:00
select.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
seq_file.c bitmap, cpumask, nodemask: remove dedicated formatting functions 2015-02-13 21:21:39 -08:00
signalfd.c fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
splice.c fs: add vfs_iter_{read,write} helpers 2015-01-29 00:13:13 -05:00
stack.c fs: fix comment for 'CONFIG_LBADF' 2014-08-26 09:35:56 +02:00
stat.c
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statfs.c
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super.c trylock_super(): replacement for grab_super_passive() 2015-02-22 11:38:42 -05:00
sync.c vfs: add support for a lazytime mount option 2015-02-05 02:45:00 -05:00
timerfd.c fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
utimes.c
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xattr.c new helper: audit_file() 2014-11-19 13:01:26 -05:00