From patchwork Tue Nov 20 17:16:53 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3.5.yuz, extended, stable] Patch "libceph: don't use bio_iter as a flag" has been added to staging queue Date: Tue, 20 Nov 2012 07:16:53 -0000 From: Herton Ronaldo Krzesinski X-Patchwork-Id: 200438 Message-Id: <1353431813-8760-1-git-send-email-herton.krzesinski@canonical.com> To: Alex Elder Cc: kernel-team@lists.ubuntu.com, Sage Weil This is a note to let you know that I have just added a patch titled libceph: don't use bio_iter as a flag to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.yuz tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Herton ------ >From 282f152ee1eab0457e4f64f65f106dac7ab9a988 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Mon, 11 Jun 2012 14:57:13 -0500 Subject: [PATCH 31/78] libceph: don't use bio_iter as a flag commit abdaa6a849af1d63153682c11f5bbb22dacb1f6b upstream. Recently a bug was fixed in which the bio_iter field in a ceph message was not being properly re-initialized when a message got re-transmitted: commit 43643528cce60ca184fe8197efa8e8da7c89a037 Author: Yan, Zheng rbd: Clear ceph_msg->bio_iter for retransmitted message We are now only initializing the bio_iter field when we are about to start to write message data (in prepare_write_message_data()), rather than every time we are attempting to write any portion of the message data (in write_partial_msg_pages()). This means we no longer need to use the msg->bio_iter field as a flag. So just don't do that any more. Trust prepare_write_message_data() to ensure msg->bio_iter is properly initialized, every time we are about to begin writing (or re-writing) a message's bio data. Signed-off-by: Alex Elder Reviewed-by: Sage Weil Signed-off-by: Herton Ronaldo Krzesinski --- net/ceph/messenger.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) -- 1.7.9.5 diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index b83c963..d47305a 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -604,7 +604,7 @@ static void prepare_write_message_data(struct ceph_connection *con) else con->out_msg_pos.page_pos = 0; #ifdef CONFIG_BLOCK - if (msg->bio && !msg->bio_iter) + if (msg->bio) init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); #endif con->out_msg_pos.data_pos = 0; @@ -672,10 +672,6 @@ static void prepare_write_message(struct ceph_connection *con) m->hdr.seq = cpu_to_le64(++con->out_seq); m->needs_out_seq = false; } -#ifdef CONFIG_BLOCK - else - m->bio_iter = NULL; -#endif dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", m, con->out_seq, le16_to_cpu(m->hdr.type),