From 84495f496170a73ed79667b7fbf91947b7f47c87 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Wed, 15 Feb 2012 07:43:55 -0600 Subject: [PATCH] libceph: some simple changes Nothing too big here. - define the size of the buffer used for consuming ignored incoming data using a symbolic constant - simplify the condition determining whether to unmap the page in write_partial_msg_pages(): do it for crc but not if the page is the zero page Signed-off-by: Alex Elder Signed-off-by: Sage Weil --- net/ceph/messenger.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index e8f236e87f38..1a22975945da 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -38,6 +38,11 @@ static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE; static struct lock_class_key socket_class; #endif +/* + * When skipping (ignoring) a block of input we read it into a "skip + * buffer," which is this many bytes in size. + */ +#define SKIP_BUF_SIZE 1024 static void queue_con(struct ceph_connection *con); static void con_work(struct work_struct *); @@ -892,8 +897,7 @@ static int write_partial_msg_pages(struct ceph_connection *con) MSG_DONTWAIT | MSG_NOSIGNAL | MSG_MORE); - if (do_crc && - (msg->pages || msg->pagelist || msg->bio || in_trail)) + if (do_crc && kaddr != zero_page_address) kunmap(page); if (ret == -EAGAIN) @@ -1982,8 +1986,9 @@ more: * * FIXME: there must be a better way to do this! */ - static char buf[1024]; - int skip = min(1024, -con->in_base_pos); + static char buf[SKIP_BUF_SIZE]; + int skip = min((int) sizeof (buf), -con->in_base_pos); + dout("skipping %d / %d bytes\n", skip, -con->in_base_pos); ret = ceph_tcp_recvmsg(con->sock, buf, skip); if (ret <= 0) -- 2.20.1