Linus Torvalds’ defective RAM slows down kernel improvement • The Register | Tech Verse

not fairly Linus Torvalds’ defective RAM slows down kernel improvement • The Register

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If the subsequent model of the Linux kernel emerges just a little slower than ordinary, blame a dodgy DIMM in Linus Torvalds’ AMD Threadripper-powered PC and the vagaries of the reminiscence market.

In a put up responding to a kernel developer who requested if he had missed a Git Pull, Torvalds revealed on Sunday that the request was nonetheless in his queue as “I am doing merges (very slowly) on my laptop computer, whereas I wait new ECC reminiscence DIMMs to reach.”

Torvalds wants the DIMMs as a result of previously few days he skilled what he described as “some instability on my major desktop…with random reminiscence corruption in consumer house, leading to my allmodconfig builds fail randomly with inner compiler errors, and many others.”

The Linux boss’s first thought was {that a} new kernel bug had prompted the issue, which is not good but it surely does occur.

His intuition was improper.

“It was actually a DIMM that randomly crashed in my machine after 2.5 years of being completely secure,” he wrote. “Think about. Verified first by booting an outdated kernel after which with memtest86+ in a single day.”

Torvalds seems to have been monitoring the supply of the brand new DIMMs, as he reported that the alternative reminiscence was “out of supply” and predicted that it ought to arrive afterward Sunday night time.

“I am going to in all probability save memtest86+ for one more night time with the brand new DIMMs simply because this wasn’t the very best expertise of my life. A good period of time wasted blaming all of the improper issues, as a result of it was _obviously_ not my {hardware} that all of the sudden crashed.” he added.

Torvalds’s put up is fascinating for 2 different causes. One is that the laptop computer he mentions could possibly be the latest MacBook, full with Apple’s Arm64 silicon, which he used to energy the ultimate lower of Linux 5.19. If that is the identical laptop computer he used on Sunday, that silicon is probably not as much as the duty of one of many world’s highest-profile workloads, or perhaps Linus simply misses the comforts of a giant display.

Your put up additionally mentions that your foremost PC was configured for error correcting code reminiscence (ECC reminiscence), however “through the early days of COVID when there was no ECC reminiscence out there at any smart worth. After which I by no means obtained round to fixing it, till I needed to catch bugs the onerous method.”

“I completely *hate* the loopy trade politics and unhealthy distributors which have made ECC reminiscence so ‘particular,'” he added.

That seems to be a reference to this put up from 2001 wherein Torvalds provided the next opinion:

The above is a reference to Intel not permitting ECC for use with all of its shopper CPUs and thus suppressing demand by making it an choice for fewer consumers. And since demand is low, producers aren’t coming to the get together, costs are staying excessive…and plenty of cannot afford the additional resiliency that ECC presents over common RAM. Which is the place this intersects with Torvalds’ each day work, as a result of Linux (and all different software program) can profit from ECC RAM’s error correction.

Torvalds is at the moment occupied by model 6.1 of the Linux kernel, which amongst different issues provides assist for the Rust programming language. ®

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Linus Torvalds’ faulty RAM slows down kernel development • The Register

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