linux-toradex.git/fs/ocfs2/dcache.c, branch v3.5.4

ocfs2: Remove masklog ML_DCACHE.

2011-02-23T14:51:49+00:00

Remove mlog(0) from fs/ocfs2/dcache.c and the masklog DCACHE.

Signed-off-by: Tao Ma

ocfs2: Remove EXIT from masklog.

2011-03-07T08:43:21+00:00

mlog_exit is used to record the exit status of a function.
But because it is added in so many functions, if we enable it,
the system logs get filled up quickly and cause too much I/O.
So actually no one can open it for a production system or even
for a test.

This patch just try to remove it or change it. So:
1. if all the error paths already use mlog_errno, it is just removed.
   Otherwise, it will be replaced by mlog_errno.
2. if it is used to print some return value, it is replaced with
   mlog(0,...).
mlog_exit_ptr is changed to mlog(0.
All those mlog(0,...) will be replaced with trace events later.

Signed-off-by: Tao Ma

ocfs2: Remove ENTRY from masklog.

2011-02-21T03:10:44+00:00

ENTRY is used to record the entry of a function.
But because it is added in so many functions, if we enable it,
the system logs get filled up quickly and cause too much I/O.
So actually no one can open it for a production system or even
for a test.

So for mlog_entry_void, we just remove it.
for mlog_entry(...), we replace it with mlog(0,...), and they
will be replace by trace event later.

Signed-off-by: Tao Ma

ocfs2: fix d_revalidate oopsen on NFS exports

2011-03-10T08:45:07+00:00

can't blindly check nd->flags in ->d_revalidate()

Signed-off-by: Al Viro

fs: dcache per-inode inode alias locking

2011-01-07T06:50:31+00:00

dcache_inode_lock can be replaced with per-inode locking. Use existing
inode->i_lock for this. This is slightly non-trivial because we sometimes
need to find the inode from the dentry, which requires d_inode to be
stabilised (either with refcount or d_lock).

Signed-off-by: Nick Piggin

fs: rcu-walk aware d_revalidate method

2011-01-07T06:50:29+00:00

Require filesystems be aware of .d_revalidate being called in rcu-walk
mode (nd->flags & LOOKUP_RCU). For now do a simple push down, returning
-ECHILD from all implementations.

Signed-off-by: Nick Piggin

fs: dcache rationalise dget variants

2011-01-07T06:50:24+00:00

dget_locked was a shortcut to avoid the lazy lru manipulation when we already
held dcache_lock (lru manipulation was relatively cheap at that point).
However, how that the lru lock is an innermost one, we never hold it at any
caller, so the lock cost can now be avoided. We already have well working lazy
dcache LRU, so it should be fine to defer LRU manipulations to scan time.

Signed-off-by: Nick Piggin

fs: dcache remove dcache_lock

2011-01-07T06:50:23+00:00

dcache_lock no longer protects anything. remove it.

Signed-off-by: Nick Piggin

fs: scale inode alias list

2011-01-07T06:50:22+00:00

Add a new lock, dcache_inode_lock, to protect the inode's i_dentry list
from concurrent modification. d_alias is also protected by d_lock.

Signed-off-by: Nick Piggin

fs: dcache scale d_unhashed

2011-01-07T06:50:21+00:00

Protect d_unhashed(dentry) condition with d_lock. This means keeping
DCACHE_UNHASHED bit in synch with hash manipulations.

Signed-off-by: Nick Piggin