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Subject[patch 13/21] CKRM: Minor cosmetic cleanups in numtasks controller
From
--
Content-Disposition: inline; filename=07c-numtasks_cleanup


Signed-Off-By: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-Off-By: Gerrit Huizenga <gh@us.ibm.com>

Simple code cleanup. No functional changes.

ckrm_numtasks.c | 98 +++++++++++++++++---------------------------------------
1 files changed, 30 insertions(+), 68 deletions(-)
Index: linux-2.6.12-rc3-ckrm5/kernel/ckrm/ckrm_numtasks.c
===================================================================
--- linux-2.6.12-rc3-ckrm5.orig/kernel/ckrm/ckrm_numtasks.c 2005-05-05 09:36:29.000000000 -0700
+++ linux-2.6.12-rc3-ckrm5/kernel/ckrm/ckrm_numtasks.c 2005-05-05 09:37:41.000000000 -0700
@@ -99,17 +99,6 @@ static void numtasks_res_initcls_one(str
return;
}

-#if 0
-static void numtasks_res_initcls(void *my_res)
-{
- struct ckrm_numtasks *res = my_res;
-
- /* Write a version which propagates values all the way down
- and replace rcbs callback with that version */
-
-}
-#endif
-
static int numtasks_get_ref_local(struct ckrm_core_class *core, int force)
{
int rc, resid = numtasks_rcbs.resid;
@@ -144,29 +133,24 @@ static int numtasks_get_ref_local(struct
res->borrow_failures++;
res->tot_borrow_failures++;
}
- } else {
+ } else
rc = force;
- }
} else if (res->over_guarantee) {
res->over_guarantee = 0;

- if (res->max_limit_failures < res->limit_failures) {
+ if (res->max_limit_failures < res->limit_failures)
res->max_limit_failures = res->limit_failures;
- }
- if (res->max_borrow_sucesses < res->borrow_sucesses) {
+ if (res->max_borrow_sucesses < res->borrow_sucesses)
res->max_borrow_sucesses = res->borrow_sucesses;
- }
- if (res->max_borrow_failures < res->borrow_failures) {
+ if (res->max_borrow_failures < res->borrow_failures)
res->max_borrow_failures = res->borrow_failures;
- }
res->limit_failures = 0;
res->borrow_sucesses = 0;
res->borrow_failures = 0;
}

- if (!rc) {
+ if (!rc)
atomic_dec(&res->cnt_cur_alloc);
- }
return rc;
}

@@ -175,18 +159,12 @@ static void numtasks_put_ref_local(struc
int resid = numtasks_rcbs.resid;
struct ckrm_numtasks *res;

- if ((resid == -1) || (core == NULL)) {
+ if ((resid == -1) || (core == NULL))
return;
- }

res = ckrm_get_res_class(core, resid, struct ckrm_numtasks);
if (res == NULL)
return;
- if (unlikely(atomic_read(&res->cnt_cur_alloc) == 0)) {
- printk(KERN_WARNING "numtasks_put_ref: Trying to decrement "
- "counter below 0\n");
- return;
- }
atomic_dec(&res->cnt_cur_alloc);
if (atomic_read(&res->cnt_borrowed) > 0) {
atomic_dec(&res->cnt_borrowed);
@@ -242,19 +220,10 @@ static void numtasks_res_free(void *my_r

parres = ckrm_get_res_class(res->parent, resid, struct ckrm_numtasks);

- if (unlikely(atomic_read(&res->cnt_cur_alloc) < 0)) {
- printk(KERN_WARNING "numtasks_res: counter below 0\n");
- }
- if (unlikely(atomic_read(&res->cnt_cur_alloc) > 0 ||
- atomic_read(&res->cnt_borrowed) > 0)) {
- printk(KERN_WARNING "numtasks_res_free: resource still "
- "alloc'd %p\n", res);
- if ((borrowed = atomic_read(&res->cnt_borrowed)) > 0) {
- for (i = 0; i < borrowed; i++) {
- numtasks_put_ref_local(parres->core);
- }
- }
- }
+ if ((borrowed = atomic_read(&res->cnt_borrowed)) > 0)
+ for (i = 0; i < borrowed; i++)
+ numtasks_put_ref_local(parres->core);
+
/* return child's limit/guarantee to parent node */
spin_lock(&parres->cnt_lock);
child_guarantee_changed(&parres->shares, res->shares.my_guarantee, 0);
@@ -264,14 +233,12 @@ static void numtasks_res_free(void *my_r
maxlimit = 0;
while ((child = ckrm_get_next_child(parres->core, child)) != NULL) {
childres = ckrm_get_res_class(child, resid, struct ckrm_numtasks);
- if (maxlimit < childres->shares.my_limit) {
+ if (maxlimit < childres->shares.my_limit)
maxlimit = childres->shares.my_limit;
- }
}
ckrm_unlock_hier(parres->core);
- if (parres->shares.cur_max_limit < maxlimit) {
+ if (parres->shares.cur_max_limit < maxlimit)
parres->shares.cur_max_limit = maxlimit;
- }

spin_unlock(&parres->cnt_lock);
kfree(res);
@@ -297,39 +264,37 @@ recalc_and_propagate(struct ckrm_numtask

/* calculate cnt_guarantee and cnt_limit */
if ((parres->cnt_guarantee == CKRM_SHARE_DONTCARE) ||
- (self->my_guarantee == CKRM_SHARE_DONTCARE)) {
+ (self->my_guarantee == CKRM_SHARE_DONTCARE))
res->cnt_guarantee = CKRM_SHARE_DONTCARE;
- } else if (par->total_guarantee) {
+ else if (par->total_guarantee) {
u64 temp = (u64) self->my_guarantee * parres->cnt_guarantee;
do_div(temp, par->total_guarantee);
res->cnt_guarantee = (int) temp;
- } else {
+ } else
res->cnt_guarantee = 0;
- }

if ((parres->cnt_limit == CKRM_SHARE_DONTCARE) ||
- (self->my_limit == CKRM_SHARE_DONTCARE)) {
+ (self->my_limit == CKRM_SHARE_DONTCARE))
res->cnt_limit = CKRM_SHARE_DONTCARE;
- } else if (par->max_limit) {
+ else if (par->max_limit) {
u64 temp = (u64) self->my_limit * parres->cnt_limit;
do_div(temp, par->max_limit);
res->cnt_limit = (int) temp;
- } else {
+ } else
res->cnt_limit = 0;
- }

/* Calculate unused units */
if ((res->cnt_guarantee == CKRM_SHARE_DONTCARE) ||
- (self->my_guarantee == CKRM_SHARE_DONTCARE)) {
+ (self->my_guarantee == CKRM_SHARE_DONTCARE))
res->cnt_unused = CKRM_SHARE_DONTCARE;
- } else if (self->total_guarantee) {
+ else if (self->total_guarantee) {
u64 temp = (u64) self->unused_guarantee * res->cnt_guarantee;
do_div(temp, self->total_guarantee);
res->cnt_unused = (int) temp;
- } else {
+ } else
res->cnt_unused = 0;
- }
}
+
/* propagate to children */
ckrm_lock_hier(res->core);
while ((child = ckrm_get_next_child(res->core, child)) != NULL) {
@@ -368,21 +333,19 @@ static int numtasks_set_share_values(voi

if ((rc == 0) && parres) {
/* Calculate parent's unused units */
- if (parres->cnt_guarantee == CKRM_SHARE_DONTCARE) {
+ if (parres->cnt_guarantee == CKRM_SHARE_DONTCARE)
parres->cnt_unused = CKRM_SHARE_DONTCARE;
- } else if (par->total_guarantee) {
+ else if (par->total_guarantee) {
u64 temp = (u64) par->unused_guarantee * parres->cnt_guarantee;
do_div(temp, par->total_guarantee);
parres->cnt_unused = (int) temp;
- } else {
+ } else
parres->cnt_unused = 0;
- }
recalc_and_propagate(res, parres);
}
spin_unlock(&res->cnt_lock);
- if (res->parent) {
+ if (res->parent)
spin_unlock(&parres->cnt_lock);
- }
return rc;
}

@@ -403,7 +366,7 @@ static int numtasks_get_stats(void *my_r
if (!res)
return -EINVAL;

- seq_printf(sfile, "Number of tasks resource:\n");
+ seq_printf(sfile, "---------Number of tasks stats start---------\n");
seq_printf(sfile, "Total Over limit failures: %d\n",
res->tot_limit_failures);
seq_printf(sfile, "Total Over guarantee sucesses: %d\n",
@@ -417,6 +380,7 @@ static int numtasks_get_stats(void *my_r
res->max_borrow_sucesses);
seq_printf(sfile, "Maximum Over guarantee failures: %d\n",
res->max_borrow_failures);
+ seq_printf(sfile, "---------Number of tasks stats end---------\n");
#ifdef NUMTASKS_DEBUG
seq_printf(sfile,
"cur_alloc %d; borrowed %d; cnt_guar %d; cnt_limit %d "
@@ -468,9 +432,8 @@ static void numtasks_change_resclass(voi
}
numtasks_put_ref_local(oldres->core);
}
- if (newres) {
+ if (newres)
(void)numtasks_get_ref_local(newres->core, 1);
- }
}

struct ckrm_res_ctlr numtasks_rcbs = {
@@ -512,9 +475,8 @@ int __init init_ckrm_numtasks_res(void)

void __exit exit_ckrm_numtasks_res(void)
{
- if (numtasks_rcbs.resid != -1) {
+ if (numtasks_rcbs.resid != -1)
ckrm_numtasks_register(NULL, NULL);
- }
ckrm_unregister_res_ctlr(&numtasks_rcbs);
numtasks_rcbs.resid = -1;
}
--

-
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