[Bug ld/22831] ld causes massive thrashing if object files are not fully memory-resident: new algorithm needed

[lkcl at lkcl dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=22831

--- Comment #2 from Luke Kenneth Casson Leighton <lkcl at lkcl dot net> ---
hi HJ, thanks for that advice - bear in mind that i am not actually
directly involved in any of the projects that are experiencing these
insane levels of thrashing.  we (you and i) are therefore talking
"to the general wider internet".

so, for anyone *finding* this bugreport, HJ is recommending that,
if you are a build maintainer and the linker phase is going into
insane thrashing, that you try 2.30 and the option HJ recommends.

now.

here's the thing, HJ: distros have to "fix" the version of binutils
and make it the default / standard for sometimes up to 18 months.
also, there's no *guarantee* that they will ever hear about this option.

can i recommend, if reports start coming in that it works, that this
option be either enabled *by default*... or... that instead, there be
an "auto-resident-memory detect" option similar to that used in gcc,
where it detects available free resident RAM for compiling and uses
that and that alone?

... and then when *that* is stable... make *that* the default.

what do you think?

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