dezgeg

24 ms·

301.
Desktop compositing latency is real(lofibucket.com)
538 points by dezgeg 9y ago|291 comments
302.
by dezgeg 9y ago
This actually happens surprisingly often in 6502 code, because unconditional branches always take three bytes, unlike conditional jumps which take two bytes. So if the value of some condition flags are known to be constant (e.g. ORing with
303.
Avoiding Two Degrees of Warming 'Is Now Totally Unrealistic'(theatlantic.com)
49 points by dezgeg 9y ago|14 comments
304.
by dezgeg 10y ago
One correction to the strncpy_from_user part, specifically this: > The process could try to read another process’s memory by giving a pointer that maps into another process’s address space. This cannot happen, there is no such thing as &
305.
by dezgeg 10y ago
> So Broadcom is paying someone to write an open driver for their own GPU. This doesn't benefit anyone else in the ARM ecosystem in the slightest. I would not be so cynical. It'd be quite unlikely that properly upstreamed Mesa
306.
by dezgeg 10y ago
Which one of those is GPLv3 and not GPLv2?
307.
by dezgeg 10y ago
kdbus was never merged to mainline.
308.
by dezgeg 10y ago
The K1 chip has a blob-free boot (unlike the newer chips AFAIK) except for the USB-based flash programming / recovery mode, so for the initial installation you'd need to manually flash the eMMC somehow if you don't want to ru
309.
by dezgeg 10y ago
From the Macintosh folklore archive: http://www.folklore.org/StoryView.py?story=I_Still_Remember_...
310.
by dezgeg 10y ago
According to my reading of the code, an open process file just holds a reference to a relatively lightweight handle to that process (struct pid), which means 1) resource exhaustion by holding onto full process structures doesn't happen
311.
by dezgeg 10y ago
Well as a practical example, I checked the latest firmware of Asus RT-AC88U (HW seems to have shipped in Q4/2015) and the strings in /usr/bin/smbd (binwalk can directly extract the Asus .trx files) point to some derived
312.
by dezgeg 10y ago
Many of them ship an old version from pre-GPLv3 times though.
313.
by dezgeg 10y ago
Yes, for instance the LOOP instruction: http://stackoverflow.com/questions/35742570/why-is-the-loop-...
314.
by dezgeg 10y ago
How's the situation for hotplugging sound devices in ALSA nowadays? The top Google results for "alsa hotplug" all point to editing configuration files or udev rules or shell scripts.
315.
by dezgeg 10y ago
Containers don't handle the case where two different versions (or otherwise conflicting variants) occur in the whole dependency tree. For instance, consider program A with direct dependencies B and C, where B needs version X of /u
316.
by dezgeg 10y ago
In fact, the U-Boot guys were working on a standard solution, quite similar to extlinux/syslinux syntax: http://git.denx.de/?p=u-boot.git;a=blob;f=doc/README.distro;... , but I guess that wasn't standard enoug
317.
by dezgeg 10y ago
Linux uses a similar thing: functions that return pointers and that can fail typically return the negated error code cast directly into a pointer: http://lxr.free-electrons.com/source/include/linux/err.h#L23
318.
Analysis shows 'Super Mario Brothers' is harder than NP-hard(phys.org)
1 points by dezgeg 10y ago|0 comments
319.
by dezgeg 11y ago
No, the boot ROM supports from booting an SD card. Though not in the sense of booting any OS like Linux, but booting a board-specific second stage bootloader like U-Boot.
320.
by dezgeg 11y ago
Because these kinds of boards don't typically have BIOS/firmware chips, the booting options are limited to what is provided by the SoC's boot ROM. An USB host stack is immensely complicated and as such something that manufact
321.
Power Wastage on an Idle Laptop(randomascii.wordpress.com)
197 points by dezgeg 11y ago|74 comments
322.
555 timer teardown: inside the world's most popular IC(righto.com)
318 points by dezgeg 11y ago|59 comments
323.
by dezgeg 11y ago
Nope, Tegra X1 support for the mainline Linux is already being done as we speak (by NVIDIA themselves): http://www.spinics.net/lists/devicetree/msg109053.html
324.
by dezgeg 11y ago
Upper case names are used for both; HWND, UINT, WPARAM, LPARAM, ULONG_PTR in that example are typedefs.
325.
by dezgeg 11y ago
The Intel Galileo has one host port and one device port and runs Linux. In my project I was able to relay enough USB packets to support USB keyboards and mice successfully. It isn't too expensive either.
326.
by dezgeg 11y ago
>>because unprivileged user-space code is able to force >>the kernel to waste a lot of time printing messages, >>slowing the whole system down >User code can do that already[...] I'm pretty su
327.
by dezgeg 11y ago
> there's no need to use switch statements and their associated complexity to map integers back into addresses, when all that's really required is for the "caller" to supply a where-to-go-next address. Do note that on
328.
Feels like Censorship(pointersgonewild.com)
16 points by dezgeg 11y ago|1 comments
329.
by dezgeg 11y ago
You don't need PAE/LPAE to get to the situation where the kernel can't directly address all physical memory. That point is reached at ~900 MB, after which you need to compile the kernel with HIGHMEM support.
330.
by dezgeg 11y ago
The LPAE extension increases the maximal possible amount of physical memory up to 1TB (40 bits).

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