Documentation: Fix up docs still talking about i_sem
.. it got changed to 'i_mutex' some time ago. Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1,5 +1,6 @@
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Locking scheme used for directory operations is based on two
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kinds of locks - per-inode (->i_sem) and per-filesystem (->s_vfs_rename_sem).
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kinds of locks - per-inode (->i_mutex) and per-filesystem
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(->s_vfs_rename_mutex).
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For our purposes all operations fall in 5 classes:
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@ -63,7 +64,7 @@ objects - A < B iff A is an ancestor of B.
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attempt to acquire some lock and already holds at least one lock. Let's
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consider the set of contended locks. First of all, filesystem lock is
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not contended, since any process blocked on it is not holding any locks.
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Thus all processes are blocked on ->i_sem.
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Thus all processes are blocked on ->i_mutex.
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Non-directory objects are not contended due to (3). Thus link
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creation can't be a part of deadlock - it can't be blocked on source
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@ -107,7 +107,7 @@ free to drop it...
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---
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[informational]
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->link() callers hold ->i_sem on the object we are linking to. Some of your
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->link() callers hold ->i_mutex on the object we are linking to. Some of your
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problems might be over...
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---
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@ -130,9 +130,9 @@ went in - and hadn't been documented ;-/). Just remove it from fs_flags
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---
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[mandatory]
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->setattr() is called without BKL now. Caller _always_ holds ->i_sem, so
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watch for ->i_sem-grabbing code that might be used by your ->setattr().
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Callers of notify_change() need ->i_sem now.
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->setattr() is called without BKL now. Caller _always_ holds ->i_mutex, so
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watch for ->i_mutex-grabbing code that might be used by your ->setattr().
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Callers of notify_change() need ->i_mutex now.
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---
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[recommended]
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