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<p class="MsoPlainText"><span lang="EN-US">Hi all,<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">In our test, We fond that , when the network down, qs->qs_holds could not be reduce to zero, it will lead to the node can</span><span lang="EN-US" style="font-family:"Courier New"">’</span><span lang="EN-US">t do fence.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">o2net_idle_timer -> o2quo_conn_err -> qs->qs_holds++, after O2NET_QUORUM_DELAY_MS if qs_holds could be subtract to zero, it could do make_decision.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">But if there are many nodes, when one node network down which contains o2net connections may not do o2net_idle_timer at the same time.
<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">So when a o2net_node have done nn->nn_still_up, but the qs_holds is not zero. because the other o2net_node have not done nn->nn_still_up.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">So the first o2net_node will do o2net_idle_timer again, and the qs_holds could be add again. And the qs_holds is global variable, so it formed a loop, the node could not do o2quo_make_decision, because of qs_holds
never be zero.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">I alter the function o2quo_conn_err, take o2quo_set_hold under control of the bit map qs_conn_bm.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Signed-off-by: Yang Zhang <zhang.yangB@h3c.com><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">---<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">fs/ocfs2/cluster/quorum.c | 8 +++++---<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">1 file changed, 5 insertions(+), 3 deletions(-)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">index 3f337e5..0fe531e 100644<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">--- a/fs/ocfs2/cluster/quorum.c<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">+++ b/fs/ocfs2/cluster/quorum.c<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">@@ -423,13 +423,15 @@ void o2quo_conn_err(u8 node)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> node, qs->qs_connected);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> clear_bit(node, qs->qs_conn_bm);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">+ /*bring set hold within this judgement, in order to avoid qs_hold<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">+ * could not be zero.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">+ */<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">+ if (test_bit(node, qs->qs_hb_bm))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">+ o2quo_set_hold(qs, node);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> mlog(0, "node %u, %d total\n", node, qs->qs_connected);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- if (test_bit(node, qs->qs_hb_bm))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- o2quo_set_hold(qs, node);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> spin_unlock(&qs->qs_lock);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
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