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Small performance optimization: wake up IO/processing threads in LIFO order.

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@928 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2009-06-30 16:13:48 +00:00
parent 700eb30c9c
commit fb0256ba8a
4 changed files with 23 additions and 4 deletions
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iscsi-scst/kernel/nthread.c
+2 -2
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@@ -974,7 +974,7 @@ int istrd(void *arg)
init_waitqueue_entry(&wait, current);
if (!test_rd_list()) {
add_wait_queue_exclusive(&iscsi_rd_waitQ, &wait);
add_wait_queue_exclusive_head(&iscsi_rd_waitQ, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (test_rd_list())
@@ -1662,7 +1662,7 @@ int istwr(void *arg)
init_waitqueue_entry(&wait, current);
if (!test_wr_list()) {
add_wait_queue_exclusive(&iscsi_wr_waitQ, &wait);
add_wait_queue_exclusive_head(&iscsi_wr_waitQ, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (test_wr_list())