From a6fa36402aba96362311318200d710ea1719e59b Mon Sep 17 00:00:00 2001 From: Kurt Hackel Date: Wed, 17 Jan 2007 14:59:12 -0800 Subject: ocfs2_dlm: wake up sleepers on the lockres waitqueue The dlm was not waking up threads waiting on the lockres wait queue, waiting for the lockres to be no longer be in the DLM_LOCK_RES_IN_PROGRESS and the DLM_LOCK_RES_MIGRATING states. Signed-off-by: Kurt Hackel Signed-off-by: Sunil Mushran Signed-off-by: Mark Fasheh --- fs/ocfs2/dlm/dlmconvert.c | 5 ++++- fs/ocfs2/dlm/dlmmaster.c | 14 +++++++++++++- fs/ocfs2/dlm/dlmrecovery.c | 1 + 3 files changed, 18 insertions(+), 2 deletions(-) (limited to 'fs/ocfs2') diff --git a/fs/ocfs2/dlm/dlmconvert.c b/fs/ocfs2/dlm/dlmconvert.c index c764dc8e40a..42c17744485 100644 --- a/fs/ocfs2/dlm/dlmconvert.c +++ b/fs/ocfs2/dlm/dlmconvert.c @@ -428,7 +428,7 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) struct dlm_lockstatus *lksb; enum dlm_status status = DLM_NORMAL; u32 flags; - int call_ast = 0, kick_thread = 0, ast_reserved = 0; + int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0; if (!dlm_grab(dlm)) { dlm_error(DLM_REJECTED); @@ -524,8 +524,11 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data) cnv->requested_type, &call_ast, &kick_thread); res->state &= ~DLM_LOCK_RES_IN_PROGRESS; + wake = 1; } spin_unlock(&res->spinlock); + if (wake) + wake_up(&res->wq); if (status != DLM_NORMAL) { if (status != DLM_NOTQUEUED) diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index b36cce034ea..6cfbdf282d4 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -1967,6 +1967,7 @@ ok: spin_unlock(&mle->spinlock); if (res) { + int wake = 0; spin_lock(&res->spinlock); if (mle->type == DLM_MLE_MIGRATION) { mlog(0, "finishing off migration of lockres %.*s, " @@ -1974,6 +1975,7 @@ ok: res->lockname.len, res->lockname.name, dlm->node_num, mle->new_master); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; dlm_change_lockres_owner(dlm, res, mle->new_master); BUG_ON(res->state & DLM_LOCK_RES_DIRTY); } else { @@ -1981,6 +1983,8 @@ ok: } spin_unlock(&res->spinlock); have_lockres_ref = 1; + if (wake) + wake_up(&res->wq); } /* master is known, detach if not already detached. @@ -2342,7 +2346,7 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, struct list_head *queue, *iter; int i; struct dlm_lock *lock; - int empty = 1; + int empty = 1, wake = 0; if (!dlm_grab(dlm)) return -EINVAL; @@ -2467,6 +2471,7 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, res->lockname.name, target); spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; spin_unlock(&res->spinlock); ret = -EINVAL; } @@ -2525,6 +2530,7 @@ fail: dlm_put_mle_inuse(mle); spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; spin_unlock(&res->spinlock); goto leave; } @@ -2567,6 +2573,7 @@ fail: dlm_put_mle_inuse(mle); spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_MIGRATING; + wake = 1; spin_unlock(&res->spinlock); goto leave; } @@ -2595,6 +2602,11 @@ leave: if (ret < 0) dlm_kick_thread(dlm, res); + /* wake up waiters if the MIGRATING flag got set + * but migration failed */ + if (wake) + wake_up(&res->wq); + /* TODO: cleanup */ if (mres) free_page((unsigned long)mres); diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c index 8c60ccc7460..e57636c399f 100644 --- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/fs/ocfs2/dlm/dlmrecovery.c @@ -1420,6 +1420,7 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data) spin_lock(&res->spinlock); res->state &= ~DLM_LOCK_RES_IN_PROGRESS; spin_unlock(&res->spinlock); + wake_up(&res->wq); /* add an extra ref for just-allocated lockres * otherwise the lockres will be purged immediately */ -- cgit v1.2.3