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extent scan: only write a detailed debug log when there's an exception

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Note that when enabled, the logs are still very CPU-intensive,
but most of the logs will be discarded.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2025-02-11 00:31:29 -05:00
parent 0953160584
commit bc7c35aa2d
1 changed files with 7 additions and 2 deletions
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5
src/bees-roots.cc
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@ -933,6 +933,7 @@ BeesScanModeExtent::SizeTier::find_next_extent()
// Low-level extent search debugging // Low-level extent search debugging
shared_ptr<ostringstream> debug_oss; shared_ptr<ostringstream> debug_oss;
const bool debug_oss_only_exceptions = true;
#if 0 #if 0
// Enable a _lot_ of debugging output // Enable a _lot_ of debugging output
debug_oss = make_shared<ostringstream>(); debug_oss = make_shared<ostringstream>();
@ -966,9 +967,11 @@ BeesScanModeExtent::SizeTier::find_next_extent()
); );
} }
if (debug_oss) { if (debug_oss) {
if (!debug_oss_only_exceptions || exception_check()) {
BEESLOGDEBUG("debug oss trace:\n" << debug_oss->str()); BEESLOGDEBUG("debug oss trace:\n" << debug_oss->str());
} }
} }
}
BtrfsIoctlSearchKey::s_debug_ostream.reset(); BtrfsIoctlSearchKey::s_debug_ostream.reset();
}); });
@ -1002,7 +1005,9 @@ BeesScanModeExtent::SizeTier::find_next_extent()
// There is a lot of debug output. Dump it if it gets too long // There is a lot of debug output. Dump it if it gets too long
if (!debug_oss->str().empty()) { if (!debug_oss->str().empty()) {
if (crawl_time.age() > 1) { if (crawl_time.age() > 1) {
if (!debug_oss_only_exceptions) {
BEESLOGDEBUG("debug oss trace (so far):\n" << debug_oss->str()); BEESLOGDEBUG("debug oss trace (so far):\n" << debug_oss->str());
}
debug_oss->str(""); debug_oss->str("");
} }
} }