linux-sg2042/net
Eric Dumazet 304e61e6fb [PATCH] net: don't insert socket dentries into dentry_hashtable
We currently insert socket dentries into the global dentry hashtable.  This
is suboptimal because there is currently no way these entries can be used
for a lookup().  (/proc/xxx/fd/xxx uses a different mechanism).  Inserting
them in dentry hashtable slows dcache lookups.

To let __dpath() still work correctly (ie not adding a " (deleted)") after
dentry name, we do :

- Right after d_alloc(), pretend they are hashed by clearing the
  DCACHE_UNHASHED bit.

- Call d_instantiate() instead of d_add() : dentry is not inserted in
  hash table.

  __dpath() & friends work as intended during dentry lifetime.

- At dismantle time, once dput() must clear the dentry, setting again
  DCACHE_UNHASHED bit inside the custom d_delete() function provided by
  socket code, so that dput() can just kill_it.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00
..
802 [NET]: Kill direct includes of asm/checksum.h 2006-12-02 21:22:59 -08:00
8021q [PATCH] Finish annotations of struct vlan_ethhdr 2006-10-10 16:15:34 -07:00
appletalk [PATCH] severing skbuff.h -> highmem.h 2006-12-04 02:00:29 -05:00
atm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 14:37:56 +00:00
ax25 [AX25]: Use kmemdup 2006-12-02 21:24:01 -08:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 14:37:56 +00:00
bridge [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
core [PATCH] hotplug CPU: clean up hotcpu_notifier() use 2006-12-07 08:39:39 -08:00
dccp [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
decnet [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
econet [NET]: Conversions from kmalloc+memset to k(z|c)alloc. 2006-07-21 14:51:30 -07:00
ethernet [NET]: Kill direct includes of asm/checksum.h 2006-12-02 21:22:59 -08:00
ieee80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 17:01:28 +00:00
ipv4 [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
ipv6 [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
ipx [IPX]: Annotate and fix IPX checksum 2006-11-05 14:11:25 -08:00
irda Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-12-05 17:01:28 +00:00
key [IPSEC]: Add AF_KEY interface for encapsulation family. 2006-12-02 21:31:50 -08:00
lapb [LAPB]: Fix windowsize check 2006-08-05 21:15:58 -07:00
llc [LLC]: anotations 2006-12-02 21:21:23 -08:00
netfilter [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
netlabel NetLabel: convert to an extensibile/sparse category bitmap 2006-12-02 21:31:36 -08:00
netlink [GENETLINK]: Add cmd dump completion. 2006-12-02 21:32:09 -08:00
netrom [NETROM]: Use kmemdup 2006-12-02 21:24:02 -08:00
packet [PATCH] severing skbuff.h -> highmem.h 2006-12-04 02:00:29 -05:00
rose [ROSE] rose_add_loopback_node: propagate -E 2006-12-02 22:17:48 -08:00
rxrpc [PATCH] Add include/linux/freezer.h and move definitions from sched.h 2006-12-07 08:39:27 -08:00
sched [PKT_SCHED] act_gact: division by zero 2006-12-02 21:32:11 -08:00
sctp [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
sunrpc [PATCH] lockdep: name some old style locks 2006-12-07 08:39:36 -08:00
tipc [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
unix [NET]: Annotate csum_partial() callers in net/* 2006-12-02 21:23:32 -08:00
wanrouter Fix misc .c/.h comment typos 2006-11-30 05:24:39 +01:00
x25 Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
xfrm [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
Kconfig [NETFILTER]: remove the reference to ipchains from Kconfig 2006-12-02 21:31:35 -08:00
Makefile [NetLabel]: core NetLabel subsystem 2006-09-22 14:53:34 -07:00
TUNABLE Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
compat.c [NET]: File descriptor loss while receiving SCM_RIGHTS 2006-10-11 23:59:48 -07:00
nonet.c [PATCH] Make most file operations structs in fs/ const 2006-03-28 09:16:06 -08:00
socket.c [PATCH] net: don't insert socket dentries into dentry_hashtable 2006-12-07 08:39:41 -08:00
sysctl_net.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00