Viewing profile — jcalvinowens

A much better title would be "A hardware backdoor in a historical VIA x86 CPU".

You stand to the side and pull it with one arm

The preliminary NTSB report: https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/G...

A lawn mower cuts grass whether you push it forward or pull it backwards: my trick when I was a kid was just to push and pull it back and forth across the lawn without changing the…

Location: Bay Area, CA, USA Remote: Yes Willing to relocate: No Technologies: C, C++, Linux, drivers, embedded, HPC, networking, video, radio, yocto Résumé/CV: https://github.com/j…

Remember that -Os is much much more aggressive in GCC than it is in LLVM, with LLVM you need to use -Oz to get the same result. GCC has historically been a bit of a pig about -Os, …

> One thing that concerns me is the possibility of on-die ECC interacting with ECC on the motherboard and reducing it’s effectiveness DDR5 on-die ECC detects and corrects one-bit e…

HDCP1 is completely broken, you can buy HDCP2.x strippers on amazon (they're often marketed as "converters").

+1 for btrfs If a NAS has a 1G or even 2.5G NIC, improving the filesystem performance is a waste of time... the network is the bottleneck. My N100 two-disk btrfs-raid1 NAS hits lin…

It's actually faster than I remembered: {0}[calvinow@sousa ~/git/linux] git describe v7.1 {0}[calvinow@sousa ~/git/linux] git clean -dffxq {0}[calvinow@sousa ~/git/linux] zcat /pro…

No, 90 seconds is the clean build time without ccache.

> The build takes about 30-45 minutes If you don't actually need all the drivers, you can use "make localmodconfig" to substantially reduce that. My local kernels build in 90 secon…

I love keyd, it uses uinput so it works on the vtty too.

https://arxiv.org/pdf/2411.09241

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XFS does use /lost+found, it calls it the "orphanage directory" and xfs_repair reparents children of corrupt directories there. Based on comments in the kernel source, it seems lik…

It is a weirdly common misconception that that fork() is cheap... it is O(N) on the size of the process, and it always has been. Yes, it's copy on write... but there is a linear re…

It's unbelievable and it's only getting worse. A 2x32GB DDR5 kit I paid $150 for 11 months ago costs $910 today from the same retailer. A 2x16GB DRR4 kit that was $105 last year is…

There's a tradeoff here people often ignore: how much does the power consumption increase? In my experience, you end up using more total power because the SIMD instructions are so …