ldap/servers/slapd/pblock.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
New commits:
commit 0e2a753cf161ee9f50d285f6bf96f8e3e0ceeb0d
Author: Noriko Hosoi <nhosoi(a)redhat.com>
Date: Wed Nov 18 11:44:35 2015 -0800
Ticket #48338 - SimplePagedResults -- abandon could happen between the abandon check
and sending results
Description: commit 390b8bd9076e8976facc0858e60985d6b4fac05c introduced
a self deadlock (see also bz1282607: 389-ds-base-1.2.11.15-67.el6_7 hang)
First phase of the following approach:
Fix design by Ludwig Krispenz and Rich Megginson (Thanks!)
Investigate the connection params used in the pblock access one by one and.
- for fields not used, either remove the access or just leave it as is
- With a big ASSERT to flag cases if the field is ever used, and a plan to
deprecate and remove the field.
- for fields with atomic access, like c_isreplication_session remove the mutex
- for filelds requiring copying, define them directly in the pblock and when
the pblock is created, populate them from the connection, the pblock access
would no longer need the c_mutex.
Removing PR_Lock(c_mutex) from slapi_pblock_get(SLAPI_CONN_CLIENTNETADDR) since
acquiring the lock is not necessary for the atomic reads. This change solves
the self deadlock.
https://fedorahosted.org/389/ticket/48338#comment:11
Reviewed by nkinder(a)redhat.com and mreynolds(a)redhat.com (Thank you, Nathan and Mark!)
(cherry picked from commit 79ca67d1fc5d50d8a9ae6b686b9564f3960f8592)
(cherry picked from commit 36245abd78f7abfed8219a5ac4a4cf50c1c0237c)
(cherry picked from commit 1d003452e3e01c04ae7f08f92864c28644e3d590)
diff --git a/ldap/servers/slapd/pblock.c b/ldap/servers/slapd/pblock.c
index b12881b..4e57fc3 100644
--- a/ldap/servers/slapd/pblock.c
+++ b/ldap/servers/slapd/pblock.c
@@ -251,14 +251,12 @@ slapi_pblock_get( Slapi_PBlock *pblock, int arg, void *value )
memset( value, 0, sizeof( PRNetAddr ));
break;
}
- PR_Lock( pblock->pb_conn->c_mutex );
+ /* For fields with atomic access, remove the PR_Lock(c_mutex) */
if ( pblock->pb_conn->cin_addr == NULL ) {
memset( value, 0, sizeof( PRNetAddr ));
} else {
- (*(PRNetAddr *)value) =
- *(pblock->pb_conn->cin_addr);
+ (*(PRNetAddr *)value) = *(pblock->pb_conn->cin_addr);
}
- PR_Unlock( pblock->pb_conn->c_mutex );
break;
case SLAPI_CONN_SERVERNETADDR:
if (pblock->pb_conn == NULL)