block: row: add magic values.

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>

Conflicts:
	block/row-iosched.c
staging: android: Lower reserved logger RAM

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
Signed-off-by: Tk-Glitch <Ti3noU@gmail.com>

Conflicts:
	drivers/staging/android/logger.c

Conflicts:
	drivers/staging/android/logger.c
af_unix: speedup /proc/net/unix /proc/net/unix has quadratic
 behavior, and can hold unix_table_lock for a while if high number of unix
 sockets are alive. (90 ms for 200k sockets...)

We already have a hash table, so its quite easy to use it.

Problem is unbound sockets are still hashed in a single hash slot
(unix_socket_table[UNIX_HASH_TABLE])

This patch also spreads unbound sockets to 256 hash slots, to speedup
both /proc/net/unix and unix_diag.

Time to read /proc/net/unix with 200k unix sockets :
(time dd if=/proc/net/unix of=/dev/null bs=4k)

before : 520 secs
after : 2 secs

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
More Optimizations

Signed-off-by: frap129 <frap129@gmail.com>