Viewing profile — dalias

5kloc is about 10x larger than musl's existing (old) malloc in source lines. I suspect lots of that is low code density, comments, etc. I have to lookup what exactly mimalloc is/do…

We'd be happy to address specific problems on the mailing list. I believe it's a known issue that the Rust compiler is making really heavy use of rapid allocation/freeing cycles, a…

The justifications are partly the same as what Daniel Micay has written extensively on in the rational for hardened_malloc ( https://github.com/GrapheneOS/hardened_malloc ) - unsyn…

There is no excuse for shell escaping bugs like this. 100% safe and reliable shell escaping is trivial: s/'/'\''/g s/^/'/ s/$/'/

Nice to see firm getting noticed. It's a really promising project.

To clarify, the numbers in my tweets are measured on Linux, comparing musl libc's posix_spawn (with CLONE_VM) to plain fork+exec (which should be independent of libc). I just poste…

The biggest problem with Cygwin is that programs linked with Cygwin inherit global state from from a Cygwin installation on the system they're running on. If you want to produce a …

These are some good observations. Note that on modern POSIX, calling anything but async-signal-safe functions after forking in a multi-threaded process results in undefined behavio…

No, fork is only one path that can lead to overcommit. Allocation of new memory as COW references to a zero page, and COW writable MAP_PRIVATE mappings of files (such as the writab…

No, OOM killer is completely orthogonal to this and is a consequence of not doing correct commit accounting. With strict commit accounting turned on (vm.overcommit_memory=2) fork w…

Yes, this is the really big deal that everyone focused on fork and mmap semantics and other details is overlooking. Having midipix as the means of producing Windows versions of cro…

Interix is a lot different because it requires installing a system component, which requires administrator privileges. Midipix produces applications that (at least as I understand …

I have a sequence of tweets here summarizing basic measurements I did on musl's posix_spawn versus fork+exec: https://twitter.com/RichFelker/status/602313644026761216 There are sti…

The choice isn't between 30sec or 15sec boot times. It's between 30sec, 15sec, or 1sec boot times, the latter coming from dropping all of the crap and writing a flat linear /etc/rc…

If your boot time was bad before and decent now, this is not thanks to the goodness of systemd but rather the badness of whatever hideous system your distro was using before, and/o…

Both forking and double-forking are completely wrong behavior for supervised daemons run as part of any automated system. Forking makes sense for small systems which lack any autom…

There are plenty of viable alternatives: s6, runit, OpenRC, and so on. I'm not really convinced uselessd is a viable alternative - it keeps way too much of the badness of systemd, …

People actually _want_ the logging behavior of systemd? My impression is that it's the most widely hated part; I've heard endless stories of journald thrashing the filesystem forev…

Systems which do not use systemd simply do not have these problems because there is no analogous component. If syslogd goes down, the worst that happens is you don't get logs. Init…

Whether it's all in pid 1 or not is irrelevant. What matters is that it has a monolithic architecture, whereby breakage in any one part or their communication channels can bring do…

Is there any proper information on this issue? The patches do not apply cleanly against the latest stable kernel (3.14.5) and there's no indication I can find as to what version th…

At the time the project was started, Ulrich Drepper was the maintainer of glibc and the official response to any bug report was "STFU". So, no. Aside from that, while a more permis…

LD_PRELOAD alone wouldn't do it because glibc's dynamic linker is closely tied to glibc. In particular thread-local storage requires close cooperation between them. Likewise, musl …

Fairly easily. A relatively small number of syscalls are used as part of implementing other functions. Most if not all of these are made via macros that expand to inline syscalls; …

musl actually has very little in the way of optimization, premature or otherwise. Most functions are written to be as simple and direct as possible. Often but not always this gives…