search for: emmc

Hello all, Is there any patches for btrfs to use enhanced area in eMMC (it will allow to boost performance i.e. it very useful to keep metadata within this area) ? If it''s exist let me know how to find it and use it. Thanks, -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel...

Currently, some new storage devices have the ability to do performance optimizations according to the type of data payload - say, file system metadata, time-stamps, sequential write in some granularity, random write and so on. For example, the latest eMMC 4.5 device can support the so-called ''Context Management'' and ''Data Tag Mechanism'' features. By receiving the information of payload data type, the eMMC 4.5 device can improve the access rate during the following read and update operations and offer a more reliab...

Hello, I am trying to figure out where to change mmc rate to maximum speed. All images are loaded from emmc. I see in syslinux.c that it calls loadfile(), but I don't see how the filesystem fread() is actually done from emmc, and where to change its speed to maximum. Thank you for any comment, ranran

Hi, me: > > [mkdiskimage] -s does not prevent zeroizing on block device. Probably > > because truncate() fails. hpa: > Yes, we should probably fix that. The tool was originally designed for > images, not for hardware devices, and it doesn't make much sense to zero > the whole hardware device like that. Maybe for privacy reasons ? But indeed: -s should skip zeroizing,

...earing, but on Arch Linux (which uses a fairly recent kernel), the missing cores come back as soon as the load falls to zero. Unfortunately, my personal budget does not allow me more than a single Odroid XU board for the time being. So I'll have to do with only one board. I happen to have an eMMC card and it is fairly fast. By the way, how do you set the CPU scheduler to "performance" (procfs something?). Just so that it can be added to the docs. -- Mikael 2013/11/14 Renato Golin <renato.golin at linaro.org> > On 14 November 2013 02:13, Sean Silva <chisophugis at...

...as the erase block size) which would be useful for tuning file system performance. And the technical people I've talked to at various Flash manufacturers all agree it's pointless to hide this information, but the product managers tend to be the roadblock. If you are buying several million eMMC flash devices for a mobile handset (i.e., for an Android device), you can find out this information, under NDA. But otherwise, the only way you can find it out is by carrying out timing attacks against the flash device. Even if they did provide this sort of information, there are lots of things w...

...How to Build on ARM" > document and will submit a patch later on. > Nice, thanks! That would be great! Unfortunately, my personal budget does not allow me more than a single > Odroid XU board for the time being. So I'll have to do with only one > board. I happen to have an eMMC card and it is fairly fast. > That's good. Still, I'd have it running locally on your master for a week or so, just to make sure it's stable enough. To create a local master you need to read this doc: https://buildbot.readthedocs.org/en/v0.8.6/manual/installation.html And add Zor...

...oisy. ARM machines work at a much lower power level than Intel ones. The scheduler is a lot more aggressive and the quality of the peripherals is *a lot* worse. Even if you set up the board for benchmarks (fix the scheduler, put everything up to 11), the quality of the external hardware (USB, SD, eMMC, etc) and their drivers do a lot of damage to any meaningful number you may extract if the moon is full and Jupiter is in Sagittarius. So... > However, if for some reason there is noise on the machine, the noise is as > likely to appear during this pre-noise-test than during the actual benc...

On Fri, Nov 03, 2017 at 06:48:11AM -0700, Johnny Hughes wrote: > On 11/02/2017 03:38 PM, Fred Smith wrote: > > On Thu, Nov 02, 2017 at 02:09:04PM -0400, m.roth at 5-cent.us wrote: > >> Yves Bellefeuille wrote: > >>> Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: > >>> > >>>> Not intending to contradict (if that ends up as pain,

Hi Gene Thanks again for your help. I'm using SYSLINUX 4.05 distributed by Ubuntu. For debugging I'm using SYSLINUX 6.03 because for some reason if I build SYSLINUX 4.05 from sources I get many compilation errors. SYSLINUX is installed on eMMC storage (along with Linux). I don't see the 3-character mode banner display. How can I check it? So I've added some timing prints to SYSLINUX 6.03 and got the following results: bootloader start 1179.140 ms before loadfile 1180.320 ms after loadfile...

...s, we should probably fix that. The tool was originally designed for > images, not for hardware devices, and it doesn't make much sense to zero > the whole hardware device like that. Probably not. But a left over backup GPT at the end of a "disk" (hard disk, thumb drive, SSD, eMMC) now confuses some UEFI implementations that look for GPT first (or only) on boot media. Regards, Mattias PS: I just received some Bay Trail hardware, so let the fun wit 32 Bit UEFI begin. -- Mattias Schlenker - Redaktion + EDV-Beratung + Linux-CD/DVD-Konzepte August-Bebel-Str. 74 - 04275 LEI...

...ably fix that. The tool was originally designed >> for images, not for hardware devices, and it doesn't make much sense >> to zero the whole hardware device like that. > Probably not. But a left over backup GPT at the end of a "disk" (hard > disk, thumb drive, SSD, eMMC) now confuses some UEFI implementations > that look for GPT first (or only) on boot media. Maybe it's a completely other problem: I had to learn that I had to delete other (older) file systems with "wipefs". Especially when I worked with "btrfs". Viele Gruesse! Helmu...

On 14 November 2013 02:13, Sean Silva <chisophugis at gmail.com> wrote: > I love Arch, but it is probably a bit too unstable for a long-term > buildbot. CC'ing Renato who might have some suggestions. > Mikael, Sean, I think having an Arch buildbot is a great idea. At Linaro, we normally test on Debian-derived distros, and having something else entirely is a good stress test

> We'd like to help in software, but we can't; we have no reliable way > of knowing most of the necessary details of this class of hardware. > It's not exported in any way. > > So unfortunately we are as in the dark as you are in this case. This is incredible, Mr Sandeen. You mean USB flash manufacturers (what's their body - the USB Implementer's Forum?) have

...ess canine-like. > > I'd be interested in the 14 inch model except it has the same wimpy specs. > so, again how much hassle (and cost) is involved in upgrading like you did? > > thanks again! OH .. mine the Insprion 11 that is a generation older than that and does not have an eMMC The memory and hard drive were easy to replace .. BUT .. that one might not be. I have not had to replace the battery. This is the one I have: https://www.pcmag.com/article2/0,2817,2468360,00.asp -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc T...

On 8/29/13 10:46 AM, Theodore Ts'o wrote: > So this is fundamentally a problem with the quality of the hardware, > and that's not something the file system can really compensate for. > And there's no way to tell whether a particular USB device has has a > high quality flash device, or is a craptastic flash device. It's not > like we can query the device for "I

...ebugging I'm using SYSLINUX 6.03 because for some reason if I build SYSLINUX 4.05 from sources I get many compilation errors. If you make anything more than -j 1, you're probably hitting dependency errors in com32/Makefile. These should be resolved now in 6. > SYSLINUX is installed on eMMC storage (along with Linux). > I don't see the 3-character mode banner display. How can I check it? It'll say SYSLINUX 6.03, with a complex version string, a 3-character mode ("CHS" or "EDD") and the copyright. If your config obscures it, that's the issue. DEFAU...

...make guarantees that all of their flash metadata are saved to stable store on a power loss event) the fact that you are constantly using fsync(2) may not be providing you with the protection you want after a power loss event. Which might not be a problem if you have a handset with a non-removable eMMC device and a non-removable battery that can't fly out when you drop the phone, but for devices which which can easily have unplanned power failure, it may every well be the case that you're going to be badly burned across a power fail event anyway. So the next question I would ask you is w...

>From the little I have heard about control systems for cars, which was some years ago, they were blockhead proprietary. The analogy would only work if computing was customarily blackbox technology, which it isn't. I'd be surprised if there were any branded flash drives that contained less than their advertised amount of storage. That leaves the question of what is going on under the

...ument and will submit a patch later on. >> > > Nice, thanks! That would be great! > > > Unfortunately, my personal budget does not allow me more than a single >> Odroid XU board for the time being. So I'll have to do with only one >> board. I happen to have an eMMC card and it is fairly fast. >> > > That's good. Still, I'd have it running locally on your master for a week > or so, just to make sure it's stable enough. > > To create a local master you need to read this doc: > > https://buildbot.readthedocs.org/en/v0.8.6/m...