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1. #KERNEL PANIC INFORMATION FOR BAD RAM MAC HOW TO#
2. #KERNEL PANIC INFORMATION FOR BAD RAM MAC BLUETOOTH#

Since hardware is handled by kernel, the only way to mark some memory addresses bad is by making kernel not allocate those addresses to any userspace program (as can be done on Linux with BadRAM which modifies kernel source). RAM failure because of growing bad blocks isn't a common case, at least no sooner than other components of device, but still can't be utterly rejected. So if RAM is defective, the most likely is that it was manufactured with faults. That's why eMMCs have a limited life but RAMs aren't subject to any such limitation. eMMC is persistent storage, so the physical properties of silicon cells change during E/P operations. Since RAM is volatile memory, its cells never get physically changed while reading/writing data unlike eMMCs. This again doesn't seem very probable for phones as the RAM is part of SoC, so the whole SoC should fail along with other, some kind of, surge protection mechanisms (if any). due to electric shock in a sudden blackout which renders it totally useless.

All of these factors are ignorable for phones because the RAM is tightly integrated with less than a square inch sized SoC chip, keeping in view all above factors.Īnother possible reason is electrical failure of the circuits/components e.g. So there are tools like memtest86 to regularly check for memory faults. due to moisture, rust, dust, jerky movements, vibration, loose connections, pressure (during installation), heat (because of overclocking or improper ventilation) etc. On PCs RAM is installed as independent modules which are prone to physical damage and wear and tear e.g. That said, what you are saying is highly unlikely to occur on phones. In addition to that, LPDRAM and eMMC are in most cases manufactured together as a single Multi-Chip Package (MCP).

#KERNEL PANIC INFORMATION FOR BAD RAM MAC BLUETOOTH#

Phones have SoCs, the module which includes CPU, GPU, RAM, eMMC, modem, WiFi, Bluetooth and GPS along with other critical components. I suppose you are talking about a phone or similar device. To me these symptoms look like those of a dying eMMC. If any of both problems requires user intervention, usually it's time to replace phone. Modern flash storage devices manage bad blocks on their own, users haven't much to do in this regard. And if it does, solutions might not be readily available, except if someone has already done that specifically for your device. It's not very likely for RAM on embedded systems to get defective. This might not be a direct solution to your problem, but I'm sharing my thoughts on it.

#KERNEL PANIC INFORMATION FOR BAD RAM MAC HOW TO#

How to leave them out? It is a ARMv7 device. UPDATE: After analyzing a lot of crash reports, seg faults and memory corruptions I am pretty sure that the unusable ram is from address 0xb6000000 to

Can restart several times on boot at different times.Restarts randomly with a previous freeze of a few of seconds (this is becouse of /proc/sys/kernel/panic is set to 5).