Re: [RFC v3 PATCH 04/10] mm/hugetlb: expose hugetlb fault mutex for use by fallocate

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On 05/22/2015 10:01 AM, Davidlohr Bueso wrote:
On Thu, 2015-05-21 at 08:47 -0700, Mike Kravetz wrote:
+/*
+ * Interfaces to the fault mutex routines for use by hugetlbfs
+ * fallocate code.  Faults must be synchronized with page adds or
+ * deletes by fallocate.  fallocate only deals with shared mappings.
+ */
+u32 hugetlb_fault_mutex_shared_hash(struct address_space *mapping, pgoff_t idx)
+{
+	return fault_mutex_hash(NULL, NULL, NULL, mapping, idx, 0);
+}
+
+void hugetlb_fault_mutex_lock(u32 hash)
+{
+	mutex_lock(&htlb_fault_mutex_table[hash]);
+}
+
+void hugetlb_fault_mutex_unlock(u32 hash)
+{
+	mutex_unlock(&htlb_fault_mutex_table[hash]);
+}+

These should really be inlined -- maybe add them to hugetlb.h along with
the mutex hashtable bits.

Thanks.  I'll figure out some way to inline them in the next version
of the patch set.

--
Mike Kravetz


Thanks,
Davidlohr


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