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authorTrond Myklebust <Trond.Myklebust@netapp.com>2005-12-13 16:13:52 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-12-19 23:11:54 -0500
commitb079fa7baa86b47579f3f60f86d03d21c76159b8 (patch)
treea62d8d031315459083d546e639faaa5ce0162a03 /net
parent3e1ec1f43307575d4e04c513aa3c30d69c32b9dc (diff)
downloadop-kernel-dev-b079fa7baa86b47579f3f60f86d03d21c76159b8.zip
op-kernel-dev-b079fa7baa86b47579f3f60f86d03d21c76159b8.tar.gz
RPC: Do not block on skb allocation
If we get something like the following, [ 125.300636] [<c04086e1>] schedule_timeout+0x54/0xa5 [ 125.305931] [<c040866e>] io_schedule_timeout+0x29/0x33 [ 125.311495] [<c02880c4>] blk_congestion_wait+0x70/0x85 [ 125.317058] [<c014136b>] throttle_vm_writeout+0x69/0x7d [ 125.322720] [<c014714d>] shrink_zone+0xe0/0xfa [ 125.327560] [<c01471d4>] shrink_caches+0x6d/0x6f [ 125.332581] [<c01472a6>] try_to_free_pages+0xd0/0x1b5 [ 125.338056] [<c013fa4b>] __alloc_pages+0x135/0x2e8 [ 125.343258] [<c03b74ad>] tcp_sendmsg+0xaa0/0xb78 [ 125.348281] [<c03d4666>] inet_sendmsg+0x48/0x53 [ 125.353212] [<c0388716>] sock_sendmsg+0xb8/0xd3 [ 125.358147] [<c0388773>] kernel_sendmsg+0x42/0x4f [ 125.363259] [<c038bc00>] sock_no_sendpage+0x5e/0x77 [ 125.368556] [<c03ee7af>] xs_tcp_send_request+0x2af/0x375 then the socket is blocked until memory is reclaimed, and no progress can ever be made. Try to access the emergency pools by using GFP_ATOMIC. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprtsock.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 0a51fd4..77e8800 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -990,6 +990,7 @@ static void xs_udp_connect_worker(void *args)
sk->sk_data_ready = xs_udp_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_no_check = UDP_CSUM_NORCV;
+ sk->sk_allocation = GFP_ATOMIC;
xprt_set_connected(xprt);
@@ -1074,6 +1075,7 @@ static void xs_tcp_connect_worker(void *args)
sk->sk_data_ready = xs_tcp_data_ready;
sk->sk_state_change = xs_tcp_state_change;
sk->sk_write_space = xs_tcp_write_space;
+ sk->sk_allocation = GFP_ATOMIC;
/* socket options */
sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
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