[PATCH 2.6.6-rc3-mm1] Add maxthinktime to sysfs

FabF
2004-04-30T22:21:05Z

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Andrew,

Here's a patch to add the asio maxthinktime to sysfs.
Could you apply ?

Regards,
Fabian

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diff -Naur orig/drivers/block/as-iosched.c edited/drivers/block/as-iosched.c
--- orig/drivers/block/as-iosched.c 2004-04-30 20:10:43.000000000 +0200
+++ edited/drivers/block/as-iosched.c 2004-05-01 00:02:59.000000000 +0200
@@ -65,7 +65,7 @@
* or doing a lengthy computation. A small penalty can be justified there, and
* will still catch out those processes that constantly have large thinktimes.
*/
-#define MAX_THINKTIME (HZ/50UL)
+unsigned long maxthinktime=(HZ/50UL);

/* Bits in as_io_context.state */
enum as_io_states {
@@ -869,7 +869,7 @@
if (test_bit(AS_TASK_IORUNNING, &aic->state)
&& in_flight == 0) {
thinktime = jiffies - aic->last_end_request;
- thinktime = min(thinktime, MAX_THINKTIME-1);
+ thinktime = min(thinktime, maxthinktime-1);
} else
thinktime = 0;
as_update_thinktime(ad, aic, thinktime);
@@ -1951,6 +1951,7 @@
{ \
return as_var_show(__VAR, (page)); \
}
+SHOW_FUNCTION(as_maxthinktime_show, maxthinktime);
SHOW_FUNCTION(as_readexpire_show, ad->fifo_expire[REQ_SYNC]);
SHOW_FUNCTION(as_writeexpire_show, ad->fifo_expire[REQ_ASYNC]);
SHOW_FUNCTION(as_anticexpire_show, ad->antic_expire);
@@ -1968,6 +1969,7 @@
*(__PTR) = (MAX); \
return ret; \
}
+STORE_FUNCTION(as_maxthinktime_store, &maxthinktime, 0, LONG_MAX);
STORE_FUNCTION(as_readexpire_store, &ad->fifo_expire[REQ_SYNC], 0, INT_MAX);
STORE_FUNCTION(as_writeexpire_store, &ad->fifo_expire[REQ_ASYNC], 0, INT_MAX);
STORE_FUNCTION(as_anticexpire_store, &ad->antic_expire, 0, INT_MAX);
@@ -1977,6 +1979,11 @@
&ad->batch_expire[REQ_ASYNC], 0, INT_MAX);
#undef STORE_FUNCTION

+static struct as_fs_entry as_maxthinktime = {
+ .attr = {.name = "maxthinktime", .mode = S_IRUGO | S_IWUSR },
+ .show = as_maxthinktime_show,
+ .store = as_maxthinktime_store,
+};
static struct as_fs_entry as_est_entry = {
.attr = {.name = "est_time", .mode = S_IRUGO },
.show = as_est_show,