Commit f2f47d0e authored Apr 06, 2022 by Sven Schnelle Committed by Heiko Carstens Apr 25, 2022

s390/mmap: increase stack/mmap gap to 128MB



This basically reverts commit 9e78a13b ("[S390] reduce miminum
gap between stack and mmap_base"). 32MB is not enough space
between stack and mmap for some programs. Given that compat
task aren't common these days, lets revert back to 128MB.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

parent 2004b57c

arch/s390/mm/mmap.c

+2 −2

Original line number	Original line	Diff line number	Diff line
	@@ -58,9 +58,9 @@ static inline unsigned long mmap_base(unsigned long rnd,

	/*		/*
	* Top of mmap area (just below the process stack).		* Top of mmap area (just below the process stack).
	* Leave at least a ~32 MB hole.		* Leave at least a ~128 MB hole.
	*/		*/
	gap_min = 32 * 1024 * 1024UL;		gap_min = SZ_128M;
	gap_max = (STACK_TOP / 6) * 5;		gap_max = (STACK_TOP / 6) * 5;

	if (gap < gap_min)		if (gap < gap_min)