[PATCH] tcp: properly initialize tcp memory limits part 2 (fix nfs regression)

From: Sergei Trofimovich <redacted>

The commit introduced NFS file transfer hangup (proved by bisection).

Commit 4acb4190 tries to fix the using uninitialized value
introduced by commit 3dc43e3,  but it would make the
per-socket memory limits too small.

This patch fixes this and also remove the redundant codes
introduced in 4acb4190.

The change looks like a typo (division flipped to multiplication):

limit = nr_free_buffer_pages() / 8;
limit = nr_free_buffer_pages() << (PAGE_SHIFT - 10);

Patch restores division.

CC: Jason Wang <redacted>
CC: Glauber Costa <redacted>
CC: David S. Miller <davem@davemloft.net>
Signed-off-by: Sergei Trofimovich <redacted>
Tested-by: Sergei Trofimovich <redacted>
---
 net/ipv4/tcp.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 22ef5f9..b11667b 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c

@@ -3299,7 +3299,7 @@ void __init tcp_init(void)
 
 	tcp_init_mem(&init_net);
 	/* Set per-socket limits to no more than 1/128 the pressure threshold */
-	limit = nr_free_buffer_pages() << (PAGE_SHIFT - 10);
+	limit = nr_free_buffer_pages() >> (PAGE_SHIFT - 10);
 	limit = max(limit, 128UL);
 	max_share = min(4UL*1024*1024, limit);
 

-- 
1.7.8.5