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[cache_writeback] Coded, needs testing

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This commit is contained in:
Joe Thornber
2016-04-14 08:54:32 +01:00
parent 4573ebb218
commit c8fec7ec40
9 changed files with 620 additions and 12 deletions
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19
caching/cache_writeback.cc
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@ -19,8 +19,13 @@ using namespace std;
namespace {
struct flags {
flags()
: cache_size(1024 * 1024 * 128) {
}
using maybe_string = boost::optional<string>;
size_t cache_size;
maybe_string metadata_dev;
maybe_string origin_dev;
maybe_string fast_dev;
@ -41,13 +46,22 @@ namespace {
if (only_dirty_ && !(m.flags_ & M_DIRTY))
return;
auto sectors_copied = copier_.copy(cblock, m.oblock_);
copy_op cop;
cop.src_b = cblock;
cop.src_e = cblock + 1ull;
cop.dest_b = m.oblock_;
// blocks
copier_.issue(cop);
stats_.blocks_issued++;
#if 0
if (sectors_copied < block_size_) {
stats_.blocks_failed++;
stats_.sectors_failed += block_size_ - sectors_copied;
}
#endif
}
struct copy_stats {
@ -107,7 +121,8 @@ namespace {
block_manager<>::ptr bm = open_bm(*f.metadata_dev, block_manager<>::READ_ONLY);
metadata md(bm, metadata::OPEN);
copier c(*f.fast_dev, *f.origin_dev, md.sb_.data_block_size);
copier c(*f.fast_dev, *f.origin_dev,
md.sb_.data_block_size, f.cache_size);
copy_visitor cv(c, clean_shutdown(md));
ignore_damage_visitor dv;
walk_mapping_array(*md.mappings_, cv, dv);