Viewing profile — osandov

This was great. Before Powder Game, there were several games in this genre, and a very active Falling Sand Game BBS forum. I got my start in programming by writing mods for one of …

It should work on ARM with a couple of caveats: * Stack tracing needs architecture-specific support which is currently only implemented for x86-64 and ppc64. It's not too hard to a…

Some folks at Delphix implemented a debugger based on mdb that's powered by drgn: https://github.com/delphix/sdb

Absolutely, same goes for anyone else who comes across this and is interested in kernel development.

Feel free to email me at $my_username@$my_username.com. I'd be happy to help you get started.

It was actually fixed in Python 3.4 with the switch to use SipHash, as the randomization introduced in Python 3.3 was still susceptible to some attacks. See https://www.python.org/…

The filesystem track at LSF/MM tends to focus on topics which impact more of the kernel than one specific filesystem, and we didn't have any of those topics for Btrfs this year. Pl…

Every subsystem is tested differently. Because of the wide variety of subsystems and workflows in the kernel, it's pretty much impossible to have a single test suite you can run an…

What problems have you had with Btrfs recently?

-fstrict-overflow is the opposite of what the parent comment was asking about. You want -fwrapv or -fno-strict-overflow.

File modes are typically written in octal, not hex.

> I don't get why BFQ hasn't been mainlined yet BFQ hasn't been mainlined because it is written for the legacy block layer in the Linux kernel, which will be replaced entirely with…

I'm curious about your NBD performance issues. When you say large number of blocks, are you talking a large filesystem? The free space cache tends to be a performance bottleneck fo…

Cool! I did something very similar to this a couple of years back: https://github.com/osandov/asmase . Instead of assembling to a file, I used the LLVM libraries to assemble in mem…

> BTW, for the specific problem of dealing with child processes, I really hope Linux adopts the Capsicum interface as FreeBSD has: > https://www.freebsd.org/cgi/man.cgi?query=pdfor…

> You could certainly imagine some kernel extensions that take all of this useful functionality and make it available in ways other than signals, leaving just signals for things yo…

Great article on LWN about this: http://lwn.net/Articles/642166/

Wow, that's pretty sweet. Any plans for trying to get that upstream?

There's also f2fs [1][2], which has a similar design but runs on flash devices with an FTL and thus takes a more middle road. It still has a log structure and tries to make things …

This is orthogonal to the argument in the article, but the "buffer overflow" example in C is incorrect. Even if sizeof(b) is smaller in the receiver than in the sender, the receive…

This is cool! Nitpick about examples 2 and 3 - the code should return something in the else case.