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27 March 2024, 02:37:15 UTC
Revision 98474236f72e5a8b89c14cd7c74f0bb77a4b1a99 authored by Waiman Long on 29 August 2013, 01:24:59 UTC, committed by Linus Torvalds on 29 August 2013, 01:24:59 UTC 
vfs: make the dentry cache use the lockref infrastructure
 
This just replaces the dentry count/lock combination with the lockref
structure that contains both a count and a spinlock, and does the
mechanical conversion to use the lockref infrastructure.

There are no semantic changes here, it's purely syntactic.  The
reference lockref implementation uses the spinlock exactly the same way
that the old dcache code did, and the bulk of this patch is just
expanding the internal "d_count" use in the dcache code to use
"d_lockref.count" instead.

This is purely preparation for the real change to make the reference
count updates be lockless during the 3.12 merge window.

[ As with the previous commit, this is a rewritten version of a concept
  originally from Waiman, so credit goes to him, blame for any errors
  goes to me.

  Waiman's patch had some semantic differences for taking advantage of
  the lockless update in dget_parent(), while this patch is
  intentionally a pure search-and-replace change with no semantic
  changes.     - Linus ]

Signed-off-by: Waiman Long <Waiman.Long@hp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 0f8f2aa
History
Tip revision: 98474236f72e5a8b89c14cd7c74f0bb77a4b1a99 authored by Waiman Long on 29 August 2013, 01:24:59 UTC
vfs: make the dentry cache use the lockref infrastructure
Tip revision: 9847423
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security
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usr
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.gitignore -rw-r--r-- 1.1 KB
.mailmap -rw-r--r-- 4.4 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 93.1 KB
Kbuild -rw-r--r-- 2.5 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 253.9 KB
Makefile -rw-r--r-- 47.4 KB
README -rw-r--r-- 18.3 KB
REPORTING-BUGS -rw-r--r-- 7.3 KB

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