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Fix auto padding free logic to respect user passed False (#4128)

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* Fix auto padding free logic to respect user passed

* Update unsloth/trainer.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
This commit is contained in:
DoubleMathew 2026-03-01 21:30:47 -06:00 • committed by GitHub
commit 6f73648ead
2 changed files with 3 additions and 1 deletions
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1
unsloth/models/rl.py
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@ -1037,6 +1037,7 @@ def _patch_trl_rl_trainers(trainer_file = "grpo_trainer"):
"include_num_input_tokens_seen": False,
"auto_find_batch_size": False, # Auto /2 batch size - too many people complained so removing
"dataloader_pin_memory": True,
"padding_free": None, # None = user didn't set it, allows auto-enable detection
# Might fail so disable for now
# "dataloader_persistent_workers" : True, # Keeps dataloader in RAM
# "dataloader_prefetch_factor" : 2,

3
unsloth/trainer.py
View file

@ -73,7 +73,7 @@ def _should_auto_padding_free(config) -> bool:
or getattr(config, "packing", False)
):
return False
return not getattr(config, "padding_free", False)
return getattr(config, "padding_free", None) is None
def _disable_sample_packing(config):
@ -392,6 +392,7 @@ def _patch_sft_trainer_auto_packing(trl_module):
packing_active = True
logger.info("Unsloth: Sample packing enabled for SFTTrainer instance.")
# Resolve padding_free: None (default) = auto-enable unless env-disabled or packing
auto_padding_free_active = False
padding_free_requested = getattr(config_arg, "padding_free", None) is True
if not blocked: