Files
glibc/elf
DJ Delorie e24269f74b Add system-wide tunables: ldconfig part
Adds support for reading /etc/tunables.conf

The file contains one line per tunable, like this:

glibc.foo.bar=14
glibc.malloc.more=0

Additionally, each line can be prefixed with a single word or character
that controls overridability by the GLIBC_TUNABLES env var:

overridable glibc.foo=0
+glibc.foo=0
   ^ May be overridden (the default)
nonoverridable glibc.foo=0
-glibc.foo=0
   ^ May not be overridden

The tunable cache format allows for a filter to be assigned to
each tunable, to be used at program start to decide if a tunable
applies to that program.  No such filters have yet been specified.

The cache format also stores a pre-parsed value for the tunable, and
the ID of the tunable, to improve load-time performance.

Reviewed-by: Arjun Shankar <arjun@redhat.com>
2026-06-30 16:46:08 -04:00
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