I have ClickHouse server running in virtual environment that reports the following warning:

```
# clickhouse-client
ClickHouse client version 22.7.2.15 (official build).
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 22.7.2 revision 54457.

Warnings:
 * Linux is not using a fast TSC clock source. Performance can be degraded. Check /sys/devices/system/clocksource/clocksource0/current_clocksource

# cat /sys/devices/system/clocksource/clocksource0/current_clocksource
kvm-clock
```

It looks like a false positive as kvm-clock is considered a preferable clock source for kvm-based VMs.
https://opensource.com/article/17/6/timekeeping-linux-vms

Regardless of whether it's a bug or not, I'd like to have some mechanism that allows to disable particular warnings. There are may be other questionable warnings in the future.

{
    auto lock = getLock();
    if (shared->index_mark_cache)
        throw Exception("Index mark cache has been already created.", ErrorCodes::LOGICAL_ERROR);
    shared->index_mark_cache = std::make_shared<MarkCache>(cache_size_in_bytes);
}
MarkCachePtr Context::getIndexMarkCache() const
{
    auto lock = getLock();
    return shared->index_mark_cache;
}
void Context::dropIndexMarkCache() const
{
    auto lock = getLock();
    if (shared->index_mark_cache)
        shared->index_mark_cache->reset();
}
void Context::setMMappedFileCache(size_t cache_size_in_num_entries)
{
    auto lock = getLock();
    if (shared->mmap_cache)
        throw Exception("Mapped file cache has been already created.", ErrorCodes::LOGICAL_ERROR);
    shared->mmap_cache = std::make_shared<MMappedFileCache>(cache_size_in_num_entries);
}
MMappedFileCachePtr Context::getMMappedFileCache() const