Commit 0212f9159694 (x86: Add Crash kernel low reservation) introduced reserve_crashkernel_low. This is used to reserve crash kernel memory either if crashkernel=size,low is given on the command line or if the region reserved by reserve_crashkernel is entirely above 4G.
reserve_crashkernel_low tries to find a block of low_size bytes. But there seems to be no good reason to restrict the lower bound of the range to low_size. Make memblock_find_in_range search from the start of memory. Signed-off-by: Jiri Bohac <[email protected]> --- diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index f81823695014..65622f07e633 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -503,7 +503,7 @@ static int __init reserve_crashkernel_low(void) return 0; } - low_base = memblock_find_in_range(low_size, 1ULL << 32, low_size, CRASH_ALIGN); + low_base = memblock_find_in_range(0, 1ULL << 32, low_size, CRASH_ALIGN); if (!low_base) { pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n", (unsigned long)(low_size >> 20)); -- Jiri Bohac <[email protected]> SUSE Labs, Prague, Czechia
