all: release mars0.1astable175

ChangeLog

@@ -182,6 +182,15 @@ Changelog for series 0.1a:
 	fixed during the preparation phase. I am releasing them
 	for the currently supported stable upstream kernels.
 
+mars0.1astable175
+	* Minor improvement: pre-allocation of higher-order
+	  pages.
+
+mars0.1astable174
+	* Minor fix: automatic restart hanging syncs.
+	* Minor fix: automatic restart hanging fetches.
+	* Minor improvement: adapt to newer pre-patch version.
+
 mars0.1astable173
 	* Minor fix: do not spawn many server kthreads on
 	  recpetion of masses of connections.

docu/mars-user-manual.lyx

@@ -2239,7 +2239,32 @@ m
 
 \begin_layout Enumerate
 A lot of sub-options for MARS will pop up.
- Leave them at their default.
+ Leave them at their default
+\begin_inset Foot
+status open
+
+\begin_layout Plain Layout
+CONFIG_MARS_DEFAULT_PORT is defaulted to 7777 or 7776.
+ Please change it when needed (to an 
+\emph on
+unsed
+\emph default
+ port range of at least 4 consecutive ports), although 
+\family typewriter
+insmod
+\family default
+ can be used for overriding it dynamically via the 
+\family typewriter
+mars_port=
+\family default
+ parameter.
+ Notice that using different ports in a bigger production setup isn't a
+ good idea, leading to confusion on firewall level etc.
+\end_layout
+
+\end_inset
+
+.
 \end_layout
 
 \begin_layout Enumerate

kernel/brick_mem.c

@@ -606,10 +606,9 @@ void __brick_block_free(void *data, int order, int cline)
 
 #ifdef CONFIG_MARS_MEM_PREALLOC
 int brick_allow_freelist = 1;
-EXPORT_SYMBOL_GPL(brick_allow_freelist);
+int brick_prefer_freelist = 1;
 
 int brick_pre_reserve[BRICK_MAX_ORDER+1] = {};
-EXPORT_SYMBOL_GPL(brick_pre_reserve);
 
 /* Note: we have no separate lists per CPU.
  * This should not hurt because the freelists are only used
@@ -709,7 +708,7 @@ int brick_mem_reserve(void)
 		int i;
 
 		brick_mem_freelist_max[order] += max;
-		BRICK_INF("preallocating %d at order %d (new maxlevel = %d)\n", max, order, brick_mem_freelist_max[order]);
+		brick_pre_reserve[order] = 0;
 
 		max = brick_mem_freelist_max[order] - atomic_read(&freelist_count[order]);
 		if (max >= 0) {
@@ -933,7 +932,9 @@ void _brick_block_free(void *data, int len, int cline)
 	}
 #endif /*  BRICK_DEBUG_MEM */
 #ifdef CONFIG_MARS_MEM_PREALLOC
-	if (order > 0 && brick_allow_freelist && atomic_read(&freelist_count[order]) <= brick_mem_freelist_max[order]) {
+	if (order > 0 && brick_allow_freelist &&
+	    (brick_prefer_freelist ||
+	     atomic_read(&freelist_count[order]) <= brick_mem_freelist_max[order])) {
 		_put_free(data, order);
 	} else
 #endif

kernel/brick_mem.h

@@ -237,6 +237,7 @@ extern void _brick_block_free(void *data, int len, int cline);
 
 #ifdef CONFIG_MARS_MEM_PREALLOC
 extern int brick_allow_freelist;
+extern int brick_prefer_freelist;
 
 extern int brick_pre_reserve[BRICK_MAX_ORDER+1];
 extern int brick_mem_freelist_max[BRICK_MAX_ORDER+1];

kernel/sy_old/mars_main.c

@@ -264,12 +264,16 @@ void update_brick_mem_freelist_max(void)
 
 	for (order = 0; order <= BRICK_MAX_ORDER; order++) {
 		int max = 0;
+		int old_max = brick_mem_freelist_max[order];
 
 		if (order == MARS_MEMRESERVE_ORDER) {
 			max = nr_affected_resources + nr_prosumer_resources;
 			max *= MEMRESERVE_FACTOR_5;
 		}
 		set_brick_mem_freelist_max(max, order);
+		if (max <= old_max)
+			continue;
+		brick_mem_reserve();
 	}
 #endif
 }

kernel/sy_old/mars_proc.c

@@ -650,6 +650,7 @@ struct ctl_table mars_table[] = {
 	INT_ENTRY("mem_used_raw_kb",      brick_global_block_used,0400),
 #ifdef CONFIG_MARS_MEM_PREALLOC
 	INT_ENTRY("mem_allow_freelist",   brick_allow_freelist,   0600),
+	INT_ENTRY("mem_prefer_freelist",  brick_prefer_freelist,  0600),
 	VEC_INT_ENTRY("mem_freelist_max", brick_mem_freelist_max,  0600, BRICK_MAX_ORDER+1),
 	VEC_INT_ENTRY("mem_alloc_count",  brick_mem_alloc_count,  0400, BRICK_MAX_ORDER+1),
 	VEC_INT_ENTRY("mem_alloc_max",    brick_mem_alloc_count,  0600, BRICK_MAX_ORDER+1),