On rbtx4927:
BUG: Bad page state in process swapper pfn:00001
page:804b7820 refcount:0 mapcount:-128 mapping:00000000 index:0x1
flags: 0x0()
raw: 00000000 00000100 00000200 00000000 00000001 00000000 ffffff7f 00000000
page dumped because: nonzero mapcount
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 5.2.0-rc1-rbtx4927-00468-g3c05ea3d4077b756 #141
Stack : 00000000 10008400 8040dc4c 87c1b974 8044af63 8040dc4c 00000001 804a3490
00000001 81000000 0030f231 80148558 00000003 10008400 87c1dd80 3d0f9a2c
00000000 00000000 804b0000 00000000 00000007 00000000 00000081 00000000
62722d31 00000080 804b0000 39347874 00000000 804b7820 8040ce18 81000010
00000001 00000007 00000001 81000000 00000018 8021de24 00000000 804a0000
...
Call Trace:
[<8010adec>] show_stack+0x74/0x104
[<801a5e44>] bad_page+0x130/0x138
[<801a654c>] free_pcppages_bulk+0x17c/0x3b0
[<801a789c>] free_unref_page+0x40/0x68
[<801120f4>] free_init_pages+0xec/0x104
[<803bdde8>] free_initmem+0x10/0x58
[<803bdb8c>] kernel_init+0x20/0x100
[<801057c8>] ret_from_kernel_thread+0x14/0x1c
As of commit b93ddc4f9156205e ("mips: Reserve memory for the kernel
image resources"), bootmem_init() no longer reserves the memory below
the kernel, while prom_free_prom_memory() still frees it.
Fix this by reverting commit b6263ff2d6e58cc2 ("MIPS: TXx9: Implement
prom_free_prom_memory").
Suggested-by: Serge Semin <[email protected]>
Fixes: b93ddc4f9156205e ("mips: Reserve memory for the kernel image resources")
Signed-off-by: Geert Uytterhoeven <[email protected]>
---
Looks like arch/mips/dec/prom/memory.c needs a similar but more
complicated fix, due to declance handling?
---
arch/mips/txx9/generic/setup.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 46537c2ca86a2eae..6d0fd0e055b4ba4a 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -33,7 +33,6 @@
#include <asm/time.h>
#include <asm/reboot.h>
#include <asm/r4kcache.h>
-#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
@@ -343,11 +342,6 @@ void __init prom_init(void)
void __init prom_free_prom_memory(void)
{
- unsigned long saddr = PAGE_SIZE;
- unsigned long eaddr = __pa_symbol(&_text);
-
- if (saddr < eaddr)
- free_init_pages("prom memory", saddr, eaddr);
}
const char *get_system_type(void)
--
2.17.1
On Wed, 22 May 2019, Geert Uytterhoeven wrote:
> Looks like arch/mips/dec/prom/memory.c needs a similar but more
> complicated fix, due to declance handling?
Thanks for the heads-up! I think the declance hack should go away. It
should have gone long ago, but ISTR there used to be a problem with making
such a large contiguous physical memory allocation in the modular case.
Maybe it's not anymore these days. I'll look into it when I get a chance
to poke at hardware, which I have no access to at the moment.
Maciej
On Wed, 22 May 2019 10:15:35 +0200, Geert Uytterhoeven <[email protected]> wrote:
> On rbtx4927:
...
> As of commit b93ddc4f9156205e ("mips: Reserve memory for the kernel
> image resources"), bootmem_init() no longer reserves the memory below
> the kernel, while prom_free_prom_memory() still frees it.
>
> Fix this by reverting commit b6263ff2d6e58cc2 ("MIPS: TXx9: Implement
> prom_free_prom_memory").
>
> Suggested-by: Serge Semin <[email protected]>
> Fixes: b93ddc4f9156205e ("mips: Reserve memory for the kernel image resources")
> Signed-off-by: Geert Uytterhoeven <[email protected]>
Thank you for fixing this. It looks OK for me.
Reviewed-by: Atsushi Nemoto <[email protected]>
---
Atsushi Nemoto
Hello,
Geert Uytterhoeven wrote:
> On rbtx4927:
>
> BUG: Bad page state in process swapper pfn:00001
> page:804b7820 refcount:0 mapcount:-128 mapping:00000000 index:0x1
> flags: 0x0()
> raw: 00000000 00000100 00000200 00000000 00000001 00000000 ffffff7f 00000000
> page dumped because: nonzero mapcount
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper Not tainted 5.2.0-rc1-rbtx4927-00468-g3c05ea3d4077b756 #141
> Stack : 00000000 10008400 8040dc4c 87c1b974 8044af63 8040dc4c 00000001 804a3490
> 00000001 81000000 0030f231 80148558 00000003 10008400 87c1dd80 3d0f9a2c
> 00000000 00000000 804b0000 00000000 00000007 00000000 00000081 00000000
> 62722d31 00000080 804b0000 39347874 00000000 804b7820 8040ce18 81000010
> 00000001 00000007 00000001 81000000 00000018 8021de24 00000000 804a0000
> ...
> Call Trace:
> [<8010adec>] show_stack+0x74/0x104
> [<801a5e44>] bad_page+0x130/0x138
> [<801a654c>] free_pcppages_bulk+0x17c/0x3b0
> [<801a789c>] free_unref_page+0x40/0x68
> [<801120f4>] free_init_pages+0xec/0x104
> [<803bdde8>] free_initmem+0x10/0x58
> [<803bdb8c>] kernel_init+0x20/0x100
> [<801057c8>] ret_from_kernel_thread+0x14/0x1c
>
> As of commit b93ddc4f9156205e ("mips: Reserve memory for the kernel
> image resources"), bootmem_init() no longer reserves the memory below
> the kernel, while prom_free_prom_memory() still frees it.
>
> Fix this by reverting commit b6263ff2d6e58cc2 ("MIPS: TXx9: Implement
> prom_free_prom_memory").
>
> Suggested-by: Serge Semin <[email protected]>
> Fixes: b93ddc4f9156205e ("mips: Reserve memory for the kernel image resources")
> Signed-off-by: Geert Uytterhoeven <[email protected]>
> Reviewed-by: Atsushi Nemoto <[email protected]>
Applied to mips-fixes.
Thanks,
Paul
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