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a9d205ebfe
libsolv/0003-Revert-Improve-choice-rule-generation.patch
Nicola Sella a9d205ebfe Revert "Improve choice rule generation" commits 
Resolves: rhbz#2151551
2022-12-07 16:58:11 +01:00

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From 21090e6067660e4a22d6227118d5cfc30629d548 Mon Sep 17 00:00:00 2001
From: Nicola Sella <nsella@redhat.com>
Date: Wed, 7 Dec 2022 16:11:10 +0100
Subject: [PATCH 1/3] Revert "Improve choice rule generation"
This reverts commit 1da9bef88dd269055cbd7eda2f3572963d6d9b64.
---
src/rules.c | 169 ++++++++++++++++++++++++++++++++++++++-------------
src/solver.c | 45 --------------
2 files changed, 126 insertions(+), 88 deletions(-)
diff --git a/src/rules.c b/src/rules.c
index 2c56959c..a260c2de 100644
--- a/src/rules.c
+++ b/src/rules.c
@@ -3255,12 +3255,6 @@ solver_rule2rules(Solver *solv, Id rid, Queue *q, int recursive)
/* check if the newest versions of pi still provides the dependency we're looking for */
-/* pi: installed package
- * r: rule for the dependency
- * m: map with all positive elements of r
- * return 0: at least one provider
- * return 1: the newest versions do not provide the dependency
- */
static int
solver_choicerulecheck(Solver *solv, Id pi, Rule *r, Map *m, Queue *q)
{
@@ -3309,6 +3303,94 @@ solver_choicerulecheck(Solver *solv, Id pi, Rule *r, Map *m, Queue *q)
return 1; /* none of the new packages provided it */
}
+static int
+solver_choicerulecheck2(Solver *solv, Id pi, Id pt, Queue *q)
+{
+ Pool *pool = solv->pool;
+ Rule *ur;
+ Id p, pp;
+ int i;
+
+ if (!q->count || q->elements[0] != pi)
+ {
+ if (q->count)
+ queue_empty(q);
+ ur = solv->rules + solv->updaterules + (pi - pool->installed->start);
+ if (!ur->p)
+ ur = solv->rules + solv->featurerules + (pi - pool->installed->start);
+ if (!ur->p)
+ return 1; /* orphaned, thus newest */
+ queue_push2(q, pi, 0);
+ FOR_RULELITERALS(p, pp, ur)
+ if (p > 0 && p != pi)
+ queue_push(q, p);
+ queue_push(q, pi);
+ }
+ if (q->count <= 3)
+ return q->count == 3 && q->elements[2] == pt ? 1 : 0;
+ if (!q->elements[1])
+ {
+ queue_deleten(q, 0, 2);
+ policy_filter_unwanted(solv, q, POLICY_MODE_CHOOSE);
+ queue_unshift(q, 1); /* filter mark */
+ queue_unshift(q, pi);
+ }
+ for (i = 2; i < q->count; i++)
+ if (q->elements[i] == pt)
+ return 1;
+ return 0; /* not newest */
+}
+
+static int
+solver_choicerulecheck3(Solver *solv, Id pt, Queue *q)
+{
+ Pool *pool = solv->pool;
+ Id p, pp;
+ int i;
+
+ if (!q->count || q->elements[0] != pt)
+ {
+ Solvable *s = pool->solvables + pt;
+ if (q->count)
+ queue_empty(q);
+ /* no installed package, so check all with same name */
+ queue_push2(q, pt, 0);
+ FOR_PROVIDES(p, pp, s->name)
+ if (pool->solvables[p].name == s->name && p != pt)
+ queue_push(q, p);
+ queue_push(q, pt);
+ }
+ if (q->count <= 3)
+ return q->count == 3 && q->elements[2] == pt ? 1 : 0;
+ if (!q->elements[1])
+ {
+ queue_deleten(q, 0, 2);
+ policy_filter_unwanted(solv, q, POLICY_MODE_CHOOSE);
+ queue_unshift(q, 1); /* filter mark */
+ queue_unshift(q, pt);
+ }
+ for (i = 2; i < q->count; i++)
+ if (q->elements[i] == pt)
+ return 1;
+ return 0; /* not newest */
+}
+
+static inline void
+queue_removeelement(Queue *q, Id el)
+{
+ int i, j;
+ for (i = 0; i < q->count; i++)
+ if (q->elements[i] == el)
+ break;
+ if (i < q->count)
+ {
+ for (j = i++; i < q->count; i++)
+ if (q->elements[i] != el)
+ q->elements[j++] = q->elements[i];
+ queue_truncate(q, j);
+ }
+}
+
static Id
choicerule_find_installed(Pool *pool, Id p)
{
@@ -3357,14 +3439,14 @@ solver_addchoicerules(Solver *solv)
Pool *pool = solv->pool;
Map m, mneg;
Rule *r;
- Queue q, qi, qcheck, infoq;
+ Queue q, qi, qcheck, qcheck2, infoq;
int i, j, rid, havechoice, negcnt;
Id p, d, pp, p2;
Solvable *s;
Id lastaddedp, lastaddedd;
int lastaddedcnt;
unsigned int now;
- int isinstalled;
+ int isnewest = 0;
solv->choicerules = solv->nrules;
if (!pool->installed)
@@ -3376,6 +3458,7 @@ solver_addchoicerules(Solver *solv)
queue_init(&q);
queue_init(&qi);
queue_init(&qcheck);
+ queue_init(&qcheck2);
queue_init(&infoq);
map_init(&m, pool->nsolvables);
map_init(&mneg, pool->nsolvables);
@@ -3395,28 +3478,20 @@ solver_addchoicerules(Solver *solv)
if (r->p >= 0 || ((r->d == 0 || r->d == -1) && r->w2 <= 0))
continue; /* only look at requires rules */
/* solver_printrule(solv, SOLV_DEBUG_RESULT, r); */
+ queue_empty(&q);
queue_empty(&qi);
havechoice = 0;
- isinstalled = 0;
FOR_RULELITERALS(p, pp, r)
{
if (p < 0)
- {
- Solvable *s = pool->solvables - p;
- p2 = s->repo == pool->installed ? -p : 0;
- if (p2)
- {
- if (!(solv->updatemap_all || (solv->updatemap.size && MAPTST(&solv->updatemap, p2 - solv->installed->start))))
- isinstalled = 1;
- }
- continue;
- }
+ continue;
s = pool->solvables + p;
if (!s->repo)
continue;
if (s->repo == pool->installed)
{
queue_push2(&qi, p, p);
+ queue_push(&q, p);
continue;
}
/* find an installed package p2 that we can update/downgrade to p */
@@ -3428,6 +3503,7 @@ solver_addchoicerules(Solver *solv)
if (policy_is_illegal(solv, pool->solvables + p2, s, 0))
continue;
queue_push2(&qi, p2, p);
+ queue_push(&q, p);
continue;
}
/* package p is independent of the installed ones */
@@ -3436,31 +3512,47 @@ solver_addchoicerules(Solver *solv)
#if 0
printf("havechoice: %d qcount %d qicount %d\n", havechoice, q.count, qi.count);
#endif
- if (!havechoice || !qi.count)
+ if (!havechoice || !q.count || !qi.count)
continue; /* no choice */
FOR_RULELITERALS(p, pp, r)
if (p > 0)
MAPSET(&m, p);
- if (!isinstalled)
+ isnewest = 1;
+ FOR_RULELITERALS(p, pp, r)
{
- /* do extra checking for packages related to installed packages */
- for (i = j = 0; i < qi.count; i += 2)
+ if (p > 0)
+ break;
+ p2 = choicerule_find_installed(pool, -p);
+ if (p2 && !solver_choicerulecheck2(solv, p2, -p, &qcheck2))
{
- p2 = qi.elements[i];
- if (solv->updatemap_all || (solv->updatemap.size && MAPTST(&solv->updatemap, p2 - solv->installed->start)))
- {
- if (solver_choicerulecheck(solv, p2, r, &m, &qcheck))
- continue;
- }
- qi.elements[j++] = p2;
- qi.elements[j++] = qi.elements[i + 1];
+ isnewest = 0;
+ break;
+ }
+ if (!p2 && !solver_choicerulecheck3(solv, -p, &qcheck2))
+ {
+ isnewest = 0;
+ break;
}
- queue_truncate(&qi, j);
}
+ /* do extra checking */
+ for (i = j = 0; i < qi.count; i += 2)
+ {
+ p2 = qi.elements[i];
+ if (!p2)
+ continue;
+ if (isnewest && solver_choicerulecheck(solv, p2, r, &m, &qcheck))
+ {
+ /* oops, remove element p from q */
+ queue_removeelement(&q, qi.elements[i + 1]);
+ continue;
+ }
+ qi.elements[j++] = p2;
+ }
+ queue_truncate(&qi, j);
- if (!qi.count)
+ if (!q.count || !qi.count)
{
FOR_RULELITERALS(p, pp, r)
if (p > 0)
@@ -3468,15 +3560,6 @@ solver_addchoicerules(Solver *solv)
continue;
}
- queue_empty(&q);
- /* split q from qi */
- for (i = j = 0; i < qi.count; i += 2)
- {
- queue_push(&q, qi.elements[i + 1]);
- qi.elements[j++] = qi.elements[i];
- }
- queue_truncate(&qi, j);
-
/* now check the update rules of the installed package.
* if all packages of the update rules are contained in
@@ -3496,7 +3579,6 @@ solver_addchoicerules(Solver *solv)
break;
if (p)
break;
- /* speed improvement: only check each package once */
for (j = i + 1; j < qi.count; j++)
if (qi.elements[i] == qi.elements[j])
qi.elements[j] = 0;
@@ -3554,6 +3636,7 @@ solver_addchoicerules(Solver *solv)
queue_free(&q);
queue_free(&qi);
queue_free(&qcheck);
+ queue_free(&qcheck2);
queue_free(&infoq);
map_free(&m);
map_free(&mneg);
diff --git a/src/solver.c b/src/solver.c
index 28341d6d..23285ff2 100644
--- a/src/solver.c
+++ b/src/solver.c
@@ -2620,43 +2620,6 @@ resolve_orphaned(Solver *solv, int level, int disablerules, Queue *dq, int *reru
return level;
}
-int
-solver_check_unneeded_choicerules(Solver *solv)
-{
- Pool *pool = solv->pool;
- Rule *r, *or;
- Id p, pp, p2, pp2;
- int i;
- int havedisabled = 0;
-
- /* check if some choice rules could have been broken */
- for (i = solv->choicerules, r = solv->rules + i; i < solv->choicerules_end; i++, r++)
- {
- if (r->d < 0)
- continue;
- or = solv->rules + solv->choicerules_info[i - solv->choicerules];
- if (or->d < 0)
- continue;
- FOR_RULELITERALS(p, pp, or)
- {
- if (p < 0 || solv->decisionmap[p] <= 0)
- continue;
- FOR_RULELITERALS(p2, pp2, r)
- if (p2 == p)
- break;
- if (!p2)
- {
- /* did not find p in choice rule, disable it */
- POOL_DEBUG(SOLV_DEBUG_SOLVER, "disabling unneeded choice rule #%d\n", i);
- solver_disablechoicerules(solv, r);
- havedisabled = 1;
- break;
- }
- }
- }
- return havedisabled;
-}
-
/*-------------------------------------------------------------------
*
* solver_run_sat
@@ -2842,14 +2805,6 @@ solver_run_sat(Solver *solv, int disablerules, int doweak)
continue;
}
- if (solv->choicerules != solv->choicerules_end && solver_check_unneeded_choicerules(solv))
- {
- POOL_DEBUG(SOLV_DEBUG_SOLVER, "did choice rule minimization, rerunning solver\n");
- solver_reset(solv);
- level = 0; /* restart from scratch */
- continue;
- }
-
if (solv->solution_callback)
{
solv->solution_callback(solv, solv->solution_callback_data);
--
2.38.1
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