On Thu, May 13, 2021 at 04:51:33PM +0100, Mel Gorman wrote:
> On Thu, May 13, 2021 at 05:29:05PM +0200, Uladzislau Rezki wrote:
> > Could you please send your config? I will try to reproduce with it.
> >
>
> Attached.
>
Thanks.
With your .config file i am able to reproduce the kernel panic. Actually
when a one page is requested the __alloc_pages_bulk() enters to the single
page allocator:
<snip>
/* Use the single page allocator for one page. */
if (nr_pages - nr_populated == 1)
goto failed;
...
failed:
page = __alloc_pages(gfp, 0, preferred_nid, nodemask);
if (page) {
if (page_list)
list_add(&page->lru, page_list);
else
page_array[nr_populated] = page;
nr_populated++;
}
return nr_populated;
<snip>
>From the trace i get:
<snip>
[ 0.243916] RIP: 0010:__alloc_pages+0x11e/0x310
[ 0.243916] Code: 84 c0 0f 85 02 01 00 00 89 d8 48 8b 54 24 08 8b 74 24 1c c1 e8 0c 83 e0 01 88 44 24 20 48 8b 04 24 48 85 d2 0f 85 71 01 00 00 <3b> 70 08 0f 82 68 01 00 00 48 89 44 24 10 48 8b 00 89 da 81 e2 00
[ 0.243916] RSP: 0000:ffffffffae803c38 EFLAGS: 00010246
[ 0.243916] RAX: 0000000000001cc0 RBX: 0000000000002102 RCX: 0000000000000004
[ 0.243916] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000002102
[ 0.243916] RBP: 0000000000000000 R08: 0000000000000000 R09: c0000000ffffdfff
[ 0.243916] R10: 0000000000000001 R11: ffffffffae803ac0 R12: 0000000000000000
[ 0.243916] R13: 0000000000002102 R14: 0000000000000001 R15: ffffa0938000d000
[ 0.243916] FS: 0000000000000000(0000) GS:ffff893ab7c00000(0000) knlGS:0000000000000000
[ 0.243916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.243916] CR2: 0000000000001cc8 CR3: 0000000176e10000 CR4: 00000000000006b0
[ 0.243916] Call Trace:
[ 0.243916] __alloc_pages_bulk+0xaa1/0xb50
<snip>
(gdb) l *__alloc_pages+0x11e
0xffffffff8129d87e is in __alloc_pages (./include/linux/mmzone.h:1095).
1090 return zoneref->zone;
1091 }
1092
1093 static inline int zonelist_zone_idx(struct zoneref *zoneref)
1094 {
1095 return zoneref->zone_idx;
1096 }
1097
1098 static inline int zonelist_node_idx(struct zoneref *zoneref)
1099 {
(gdb)
Seems like "zoneref" refers to invalid address.
Thoughts?
--
Vlad Rezki
