Changeset fb63c06 in mainline for kernel/genarch/include

Timestamp:

2016-09-01T16:37:51Z (9 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2a2fbc8

Parents:

346b12a2

Message:

Make page hash table critical sections smaller

After the change of the page mapping interface to work exclusively with
a copy of the actual PTE, the critical section around page hash table
look-ups, insertions and deletions can be much smaller.

This change necessitated the change of the page_ht_lock mutex into a
spinlock, because the page mapping API can be used from within TLB
shootdown sequence, which is basically a spinlock-protected critical
section and we cannot take a mutex while holding a spinlock.

File:

• kernel/genarch/include/genarch/mm/page_ht.h (modified) (2 diffs)

kernel/genarch/include/genarch/mm/page_ht.h

@@ -44 +44 @@
 #include <mm/page.h>
 #include <mm/slab.h>
-#include <synch/mutex.h>
 #include <adt/hash_table.h>
 
@@ -66 +65 @@
 
 extern slab_cache_t *pte_cache;
-extern mutex_t page_ht_lock;
 extern hash_table_t page_ht;
 extern hash_table_operations_t ht_operations;