On 2/19/25 11:24, Bernhard Voelker wrote:
On 2/10/25 2:34 PM, Matteo Croce wrote:
mu is a new tool which shows the amount of data that a set of files
are keeping into the cache.
mu uses the new cachestat() syscall introduced with Linux 6.5.
The GNU coreutils aim to be a platform independent implementation of a
certain
set of tools, most of them specified by POSIX.
Busybox has a "readahead" command under miscutils, which preloads a file
into disk cache. This seems like an option to readahead. (Maybe -s to
show size?)
As 'mu' seems to be bound to the GNU/Linux kernel and the particular
cachestat() syscall,
The "GNU/Linux kernel"?
So Stallman's explicitly claiming the Linux _kernel_ now?
it seems to be impossible to provide the same functionality under other
kernels and platforms.
People have implemented multiple compatible kernels running linux
syscalls. Standalone things like https://github.com/vvaltchev/tilck but
more often API layers: Microsoft's WSL 1.0 was basically Wine backwards,
FreeBSD's Linuxulator has been doing it for 20 years, Solaris had Linux
Zones, the L in AIX 5L stood for "Linux Affinity" (IBM's name for binary
compatibility), QEMU's application mode is bidirectional translation of
each individual syscall... Heck, the 86Open project (a big multi-vendor
effort back in 1997 to create a common Intel Unix binary format) gave up
and declared "just use lxrun with linux binaries" back in 1999:
https://web.archive.org/web/20010424134601/http://www.telly.org/86open/
Luckily util-linux and friends exist to host commands gnu/coreutils
doesn't want to. And busybox. And toybox. Heck, Chimera Linux uses BSD's
userspace on a Linux kernel. (Linux has always been about modularity.
Interchangeable parts available from multiple sources, you can use
dropbear instead of openssh, etc.)
I still think readahead -s makes sense here. You can tell Denys I said
so if you like. :)
Rob
