I changed
static atomic64_t last_value = ATOMIC64_INIT(0);
to
volatile static atomic64_t last_value = ATOMIC64_INIT(0);
but then Linux got stuck in
(gdb) bt 8
#0 panic (fmt=0x0) at
/local/lindi/debian-linux-2.6/linux-2.6-2.6.32/debian/build/source_amd64_none/kernel/panic.c:137
#1 0xffffffff812e550f in find_early_table_space (use_gbpages=<value optimized
out>, use_pse=<value optimized out>, end=<value optimized out>)
at
/local/lindi/debian-linux-2.6/linux-2.6-2.6.32/debian/build/source_amd64_none/arch/x86/mm/init.c:80
#2 init_memory_mapping (use_gbpages=<value optimized out>, use_pse=<value
optimized out>, end=<value optimized out>)
at
/local/lindi/debian-linux-2.6/linux-2.6-2.6.32/debian/build/source_amd64_none/arch/x86/mm/init.c:271
#3 0xffffffff814f0e25 in ?? ()
#4 0xffffffff814ed9d0 in start_kernel () at
/local/lindi/debian-linux-2.6/linux-2.6-2.6.32/debian/build/source_amd64_none/init/main.c:546
#5 0xffffffff8307f000 in ?? ()
#6 0xffffffff83080000 in ?? ()
#7 0xffffffff83081000 in ?? ()
(More stack frames follow...)
without printing anything. The check in question is probably
e820_table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
tables, PAGE_SIZE);
if (e820_table_start == -1UL)
panic("Cannot find space for the kernel page tables");
Any idea what is going on?
-Timo
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