You need to apply doc/bm-journal.patch to create the journal.
thin_journal_check confirms that if the machine had crashed at any time
during the test run no metadata corruption would have occured.
There is a failure while compiling with libc musl:
[snip]
|./block-cache/io_engine.h:18:17: error: expected
unqualified-id before numeric constant
| unsigned const PAGE_SIZE = 4096;
[snip]
The musl defeines macro PAGE_SIZE, undef it conditionally
could fix the issue.
http://musl.openwall.narkive.com/tO8vrHdP/why-musl-define-page-size
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
This fixes following build failure with Boost 1.67.0:
```
In file included from /usr/include/boost/optional/optional.hpp:33,
from /usr/include/boost/optional.hpp:15,
from ./thin-provisioning/emitter.h:23,
from contrib/thin_sexp_emitter.cc:2:
/usr/include/boost/optional/optional.hpp: In instantiation of ‘std::basic_ostream<_CharT, _Traits>& boost::operator<<(std::basic_ostream<_CharT, _Traits>&, const boost::optional_detail::optional_tag&) [with CharType = char; CharTrait = std::char_traits<char>]’:
./base/indented_stream.h:31:9: required from ‘{anonymous}::indented_stream& {anonymous}::indented_stream::operator<<(const T&) [with T = boost::optional<unsigned int>]’
contrib/thin_sexp_emitter.cc:105:29: required from ‘void {anonymous}::sexp_emitter::kv(const char*, const T&) [with T = boost::optional<unsigned int>]’
contrib/thin_sexp_emitter.cc:29:21: required from here
/usr/include/boost/optional/optional.hpp:1481:3: error: static assertion failed: If you want to output boost::optional, include header <boost/optional/optional_io.hpp>
BOOST_STATIC_ASSERT_MSG(sizeof(CharType) == 0, "If you want to output boost::optional, include header <boost/optional/optional_io.hpp>");
^~~~~~~~~~~~~~~~~~~~~~~
make: *** [contrib/Makefile:15: contrib/thin_sexp_emitter.o] Error 1
```
boost/optional/optional_io.hpp exists since at least Boost 1.34.0, so it is
safe to include in older versions, too.
Preserve the input block first to avoid reusing it in subsequent
shadow operations, e.g., shadow another block when releasing
a recursive lock. (issue #97)
