[LU-4902] Do not require rpc_lock for readdir

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.6.0
• Affects Version/s: Lustre 2.6.0, Lustre 2.4.3
• Severity: 3
• Assignee: Di Wang
• Reporter: Di Wang

Description

[4/13/14, 3:46:55 AM] Alex Zhuravlev: mdc_read_page() enqueues a lock with IT_READDIR, but then in mdc_get_rpc_lock():

static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck,
				    struct lookup_intent *it)
{
	ENTRY;

	if (it != NULL && (it->it_op == IT_GETATTR || it->it_op == IT_LOOKUP ||
			   it->it_op == IT_LAYOUT))
		return;

[4/13/14, 3:47:30 AM] Alex Zhuravlev: so, enqueue for readdir is serialized with open/reint ?

Issue Links

• is related to: LU-4906 rm -rf triggers too much MDS_READPAGE