From: Matan Breizman <mbreizma@redhat.com>
Date: Sun, 2 Jul 2023 12:34:54 +0000 (+0000)
Subject: crimson/osd/shard_services: add comment to next_tid initialization
X-Git-Tag: v19.0.0~30^2~11
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=7cd0aa0db0c8f7452d7705a93d765981753b48c4;p=ceph.git

crimson/osd/shard_services: add comment to next_tid initialization

Signed-off-by: Matan Breizman <mbreizma@redhat.com>
---

diff --git a/src/crimson/osd/shard_services.cc b/src/crimson/osd/shard_services.cc
index 404f28d7d7f3..c0688f957699 100644
--- a/src/crimson/osd/shard_services.cc
+++ b/src/crimson/osd/shard_services.cc
@@ -47,6 +47,8 @@ PerShardState::PerShardState(
     perf(perf), recoverystate_perf(recoverystate_perf),
     throttler(crimson::common::local_conf()),
     next_tid(
+      // Use shard_id to initialize upper 8 bits of counters to ensure that
+      // ids generated by different shards are disjoint
       static_cast<ceph_tid_t>(seastar::this_shard_id()) <<
       (std::numeric_limits<ceph_tid_t>::digits - 8)),
     startup_time(startup_time)