fix performance issue of pick_a_shard

Signed-off-by: liqiang <liqiang64@huawei.com>

0021-common-mempool-Add-test-for-mempool-shards.patch

@@ -0,0 +1,39 @@
+From e4e07de8f36d0d44b341d5784a8bf56192201b95 Mon Sep 17 00:00:00 2001
+From: Adam Kupczyk <akupczyk@redhat.com>
+Date: Mon, 25 Jan 2021 11:33:28 +0100
+Subject: [PATCH] common/mempool: Add test for mempool shards
+
+Add test that checks quality of mempool sharing.
+It refuses to accept cases when variance is too large.
+
+Signed-off-by: Adam Kupczyk <akupczyk@redhat.com>
+---
+ src/include/mempool.h    |  9 +++++++--
+ 1 files changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/src/include/mempool.h b/src/include/mempool.h
+index 2247cb15bc0..a18f6a502da 100644
+--- a/src/include/mempool.h
++++ b/src/include/mempool.h
+@@ -255,11 +255,16 @@ public:
+ 
+   void adjust_count(ssize_t items, ssize_t bytes);
+ 
+-  shard_t* pick_a_shard() {
++  static size_t pick_a_shard_int() {
+     // Dirt cheap, see:
+-    //   http://fossies.org/dox/glibc-2.24/pthread__self_8c_source.html
++    //   https://fossies.org/dox/glibc-2.32/pthread__self_8c_source.html
+     size_t me = (size_t)pthread_self();
+     size_t i = (me >> 3) & ((1 << num_shard_bits) - 1);
++    return i;
++  }
++
++  shard_t* pick_a_shard() {
++    size_t i = pick_a_shard_int();
+     return &shard[i];
+   }
+
+-- 
+2.23.0.windows.1
+

0022-common-mempool-Modify-shard-selection-function.patch

@@ -0,0 +1,28 @@
+From fccbdc0905e3868666fbb10803bac6b73f687cb1 Mon Sep 17 00:00:00 2001
+From: Adam Kupczyk <akupczyk@redhat.com>
+Date: Mon, 25 Jan 2021 11:45:06 +0100
+Subject: [PATCH] common/mempool: Modify shard selection function
+
+Modify shard selection function, so no longer all threads use the same shard 0.
+
+Signed-off-by: Adam Kupczyk <akupczyk@redhat.com>
+---
+ src/include/mempool.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/include/mempool.h b/src/include/mempool.h
+index a18f6a502da..c03aa175cfa 100644
+--- a/src/include/mempool.h
++++ b/src/include/mempool.h
+@@ -259,7 +259,7 @@ public:
+     // Dirt cheap, see:
+     //   https://fossies.org/dox/glibc-2.32/pthread__self_8c_source.html
+     size_t me = (size_t)pthread_self();
+-    size_t i = (me >> 3) & ((1 << num_shard_bits) - 1);
++    size_t i = (me >> 12) & ((1 << num_shard_bits) - 1);
+     return i;
+   }
+ 
+-- 
+2.23.0.windows.1
+

0023-common-mempool-only-fail-tests-if-sharding-is-very-b.patch

@@ -0,0 +1,27 @@
+From db79769d6d557acc021a434ff285db2d69458d0a Mon Sep 17 00:00:00 2001
+From: singuliere <singuliere@autistici.org>
+Date: Wed, 17 Mar 2021 07:35:04 +0100
+Subject: [PATCH] common/mempool: only fail tests if sharding is very bad
+
+Fixes: https://tracker.ceph.com/issues/49781
+Signed-off-by: singuliere <singuliere@autistici.org>
+---
+ src/include/mempool.h    |  2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/src/include/mempool.h b/src/include/mempool.h
+index c03aa175cfa..fe84f3b8f09 100644
+--- a/src/include/mempool.h
++++ b/src/include/mempool.h
+@@ -259,7 +259,7 @@ public:
+     // Dirt cheap, see:
+     //   https://fossies.org/dox/glibc-2.32/pthread__self_8c_source.html
+     size_t me = (size_t)pthread_self();
+-    size_t i = (me >> 12) & ((1 << num_shard_bits) - 1);
++    size_t i = (me >> CEPH_PAGE_SHIFT) & ((1 << num_shard_bits) - 1);
+     return i;
+   }
+
+-- 
+2.23.0.windows.1
+

ceph.spec

@@ -68,7 +68,7 @@
 #################################################################################
 Name:		ceph
 Version:	12.2.8
-Release:	15
+Release:	16
 Epoch:		2
 
 # define _epoch_prefix macro which will expand to the empty string if epoch is
@@ -104,6 +104,9 @@ Patch17: 0017-CVE-2021-3524-1.patch
 Patch18: 0018-CVE-2020-1760-1.patch
 Patch19: 0019-CVE-2020-1760-2.patch
 Patch20: 0020-CVE-2020-1760-3.patch
+Patch21: 0021-common-mempool-Add-test-for-mempool-shards.patch
+Patch22: 0022-common-mempool-Modify-shard-selection-function.patch
+Patch23: 0023-common-mempool-only-fail-tests-if-sharding-is-very-b.patch
 
 %if 0%{?suse_version}
 %if 0%{?is_opensuse}
@@ -1812,6 +1815,10 @@ exit 0
 
 
 %changelog
+* Wed Dec 29 2021 Li Qiang <liqiang64@huawei.com> - 1:12.2.8-16
+- Synchronize the performance optimization of the pick_a_shard
+- function in the upstream community.
+
 * Fri Aug 6 2021 chixinze <xmdxcxz@gmail.com> - 1:12.2.8-15
 - fix https://gitee.com/src-openeuler/ceph/issues/I43TE9