Merge PR #52944 into main

* refs/pull/52944/head:
	PendingReleaseNotes: add a note for `mds_session_metadata_threshold` mds config
	test: add test to verify that a buggy client is blocklisted
	mds: add perf counter to track number of sessions evicted due to metadata threshold being exceeded
	mds: blocklist clients with "bloated" session metadata

Reviewed-by: Robin H. Johnson <robbat2@orbis-terrarum.net>
Reviewed-by: Dhairya Parmar <dparmar@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc .githubmap
index 08da187a58e55f53f2476752448e90d2ccd8b398,08da187a58e55f53f2476752448e90d2ccd8b398..b5d447631344aaafe6bd4981917029c5b39b40f8
--- 1/.githubmap
--- 2/.githubmap
+++ b/.githubmap
@@@ -174,3 -174,3 +174,4 @@@ parth-gr Parth Arora <paarora@redhat.co
  phlogistonjohn John Mulligan <jmulligan@redhat.com>
  baergj Joshua Baergen <jbaergen@digitalocean.com>
  zmc Zack Cerza <zack@redhat.com>
++robbat2 Robin H. Johnson <robbat2@orbis-terrarum.net>

diff --cc qa/tasks/cephfs/test_client_limits.py
index f2d63920564f14edced1cfac7add38c69bae5a5e,102f22f960cc4d2835c66c488d83a9567ae0b194..a9bd7d631c08e6d679d60c7f5705c4251e94d23f
--- 1/qa/tasks/cephfs/test_client_limits.py
--- 2/qa/tasks/cephfs/test_client_limits.py
+++ b/qa/tasks/cephfs/test_client_limits.py
@@@ -9,8 -9,8 +9,9 @@@ from textwrap import deden
  from tasks.ceph_test_case import TestTimeoutError
  from tasks.cephfs.cephfs_test_case import CephFSTestCase, needs_trimming
  from tasks.cephfs.fuse_mount import FuseMount
+ from teuthology.exceptions import CommandFailedError
  import os
 +from io import StringIO
  
  
  log = logging.getLogger(__name__)