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Commit 9cb610d8 authored by Rusty Russell's avatar Rusty Russell
Browse files

module: remove the SHF_ALLOC flag on the __versions section. 



Impact: reduce kernel memory usage

This patch just takes off the SHF_ALLOC flag on __versions so we don't
keep them around after module load.

This saves about 7% of module memory if CONFIG_MODVERSIONS=y.

Cc: Shawn Bohrer <shawn.bohrer@gmail.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent c6e665c8

kernel/module.c

+3 −0
Original line number Diff line number Diff line
@@ -1961,6 +1961,9 @@ static noinline struct module *load_module(void __user *umod, 
		if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)

			sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;

#endif

		/* Don't keep __versions around; it's just for loading. */

		if (strcmp(secstrings + sechdrs[i].sh_name, "__versions") == 0)

			sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;

	}



	modindex = find_sec(hdr, sechdrs, secstrings,