From 41965e194599af42e77bcf2462bd9c0db2823b16 Mon Sep 17 00:00:00 2001 From: Stefan Berger Date: Tue, 1 Nov 2022 11:06:03 -0400 Subject: [PATCH] ieee1275: Increase initially allocated heap from 1/4 to 1/3 The patch 'ieee1275: claim more memory' (commit 910676645d) states: "[...] This leaves us 381MB. 1/4 of 381MB is ~95MB. That should be enough to verify a 30MB vmlinux and should eave plenty of space to load Linux and the initrd." As it turns out the memory limit of ~95MB is insufficient for the FADUMP use case as described here: https://bugzilla.redhat.com/show_bug.cgi?id=2139000#c1 Adjust the current memory limitation by increasing the allocation to 1/3 of 381 MB, so ~127MB. Signed-off-by: Stefan Berger --- grub-core/kern/ieee1275/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c index 0bacc2348..f75a36493 100644 --- a/grub-core/kern/ieee1275/init.c +++ b/grub-core/kern/ieee1275/init.c @@ -47,7 +47,7 @@ #include /* The maximum heap size we're going to claim. Not used by sparc. - We allocate 1/4 of the available memory under 4G, up to this limit. */ + We allocate 1/3 of the available memory under 4G, up to this limit. */ #ifdef __i386__ #define HEAP_MAX_SIZE (unsigned long) (64 * 1024 * 1024) #else // __powerpc__ @@ -415,7 +415,7 @@ grub_claim_heap (void) grub_machine_mmap_iterate (heap_size, &total); - total = total / 4; + total = total / 3; if (total > HEAP_MAX_SIZE) total = HEAP_MAX_SIZE; -- 2.35.3