[merged mm-stable] mm-damon-sysfs-support-fixed-virtual-address-ranges-monitoring.patch removed from -mm tree

[merged mm-stable] mm-damon-sysfs-support-fixed-virtual-address-ranges-monitoring.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/damon/sysfs: support fixed virtual address ranges monitoring
has been removed from the -mm tree.  Its filename was
     mm-damon-sysfs-support-fixed-virtual-address-ranges-monitoring.patch

This patch was dropped because it was merged into mm-stable

------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/sysfs: support fixed virtual address ranges monitoring

This commit makes DAMON sysfs interface to support the fixed virtual
address ranges monitoring.  After this commit, writing 'fvaddr' to the
'operations' DAMON sysfs file makes DAMON uses the monitoring operations
set for fixed virtual address ranges, so that users can monitor accesses
to only interested virtual address ranges.

[sj@kernel.org: fix pid leak under fvaddr ops use case]
  Link: https://lkml.kernel.org/r/20220503220531.45913-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20220426231750.48822-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/sysfs.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

--- a/mm/damon/sysfs.c~mm-damon-sysfs-support-fixed-virtual-address-ranges-monitoring
+++ a/mm/damon/sysfs.c
@@ -1694,7 +1694,7 @@ static struct kobj_type damon_sysfs_attr
 /* This should match with enum damon_ops_id */
 static const char * const damon_sysfs_ops_strs[] = {
 	"vaddr",
-	"unsupported",	/* fvaddr is not supported by sysfs yet */
+	"fvaddr",
 	"paddr",
 };
 
@@ -1844,9 +1844,6 @@ static ssize_t operations_store(struct k
 
 	for (id = 0; id < NR_DAMON_OPS; id++) {
 		if (sysfs_streq(buf, damon_sysfs_ops_strs[id])) {
-			/* fvaddr is not supported by sysfs yet */
-			if (id == DAMON_OPS_FVADDR)
-				return -EINVAL;
 			context->ops_id = id;
 			return count;
 		}
@@ -2089,7 +2086,8 @@ static void damon_sysfs_destroy_targets(
 	struct damon_target *t, *next;
 
 	damon_for_each_target_safe(t, next, ctx) {
-		if (ctx->ops.id == DAMON_OPS_VADDR)
+		if (ctx->ops.id == DAMON_OPS_VADDR ||
+				ctx->ops.id == DAMON_OPS_FVADDR)
 			put_pid(t->pid);
 		damon_destroy_target(t);
 	}
@@ -2136,7 +2134,8 @@ static int damon_sysfs_set_targets(struc
 			damon_sysfs_destroy_targets(ctx);
 			return -ENOMEM;
 		}
-		if (ctx->ops.id == DAMON_OPS_VADDR) {
+		if (ctx->ops.id == DAMON_OPS_VADDR ||
+				ctx->ops.id == DAMON_OPS_FVADDR) {
 			t->pid = find_get_pid(sys_target->pid);
 			if (!t->pid) {
 				damon_sysfs_destroy_targets(ctx);
@@ -2206,7 +2205,7 @@ static void damon_sysfs_before_terminate
 {
 	struct damon_target *t, *next;
 
-	if (ctx->ops.id != DAMON_OPS_VADDR)
+	if (ctx->ops.id != DAMON_OPS_VADDR && ctx->ops.id != DAMON_OPS_FVADDR)
 		return;
 
 	mutex_lock(&ctx->kdamond_lock);
_

Patches currently in -mm which might be from sj@kernel.org are