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Calculation of memory zones decimal GFP mask

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The calculation from the decimal value of the CFP mask is more reliable
than checking whether the strings "DMA32" and "DMA" are included.
This commit is contained in:
Carsten Grohmann 2023-01-23 16:32:46 +01:00
parent 17536301d6
commit 4011c1f755
1 changed files with 31 additions and 3 deletions
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34
OOMAnalyser.py
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@ -550,6 +550,8 @@ class BaseKernelConfig:
self._gfp_calc_all_values()
self.gfp_reverse_lookup = self._gfp_create_reverse_lookup()
self._check_mandatory_gfp_flags()
def _gfp_calc_all_values(self):
"""
Calculate decimal values for all GFP flags and store in in GFP_FLAGS[<flag>]["_value"]
@ -644,6 +646,25 @@ class BaseKernelConfig:
res.extend(modifier)
return res
def _check_mandatory_gfp_flags(self):
"""
Check existance of mandatory flags used in
OOMAnalyser._calc_trigger_process_values() to calculate the memory zone
"""
if "__GFP_DMA" not in self.GFP_FLAGS:
error(
"Missing definition of GFP flag __GFP_DMA for kernel {}.{}.{}".format(
*self.release
)
)
if "__GFP_DMA32" not in self.GFP_FLAGS:
error(
"Missing definition of GFP flag __GFP_DMA for kernel {}.{}.{}".format(
*self.release
)
)
return
class KernelConfig_3_10(BaseKernelConfig):
@ -2881,6 +2902,9 @@ class OOMAnalyser:
flags.append("0x{0:x}".format(unknown))
flags = " | ".join(flags)
self.oom_result.details["_trigger_proc_gfp_mask_decimal"] = int(
self.oom_result.details["trigger_proc_gfp_mask"], 16
)
self.oom_result.details["trigger_proc_gfp_mask"] = "{} ({})".format(
self.oom_result.details["trigger_proc_gfp_mask"], flags
)
@ -3143,10 +3167,14 @@ class OOMAnalyser:
self.oom_result.details["trigger_proc_requested_memory_pages"]
* self.oom_result.details["page_size_kb"]
)
if "DMA32" in self.oom_result.details["trigger_proc_gfp_mask"]:
zone = "DMA32"
elif "DMA" in self.oom_result.details["trigger_proc_gfp_mask"]:
gfp_mask_decimal = self.oom_result.details["_trigger_proc_gfp_mask_decimal"]
gfp_flag_dma = self.oom_result.kconfig.GFP_FLAGS["__GFP_DMA"]["_value"]
gfp_flag_dma32 = self.oom_result.kconfig.GFP_FLAGS["__GFP_DMA32"]["_value"]
if (gfp_mask_decimal & gfp_flag_dma) == gfp_flag_dma:
zone = "DMA"
elif (gfp_mask_decimal & gfp_flag_dma32) == gfp_flag_dma32:
zone = "DMA32"
else:
zone = "Normal"
self.oom_result.details["trigger_proc_mem_zone"] = zone