Hi All,
I have been tracking similar issue(s) with soft lockup or panics on my system consistently with my workload.
Tried multiple kernel versions. Issue seem to happen consistently on 6.1-rc1 (while it seem to happen on 5.17, 5.19, 6.0.X)
PANIC: "Kernel panic - not syncing: softlockup: hung tasks"
RIP: 0000000000000001 RSP: ff3d8e7f0d9978ea RFLAGS: ff3d8e7f0d9978e8
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000006b9c66f1 RSI: ff506ca15ff33c20 RDI: 0000000000000000
RBP: ffffffff84bc64cc R8: ff3d8e412cabdff0 R9: ffffffff84c00e8b
R10: ff506ca15ff33b69 R11: 0000000000000000 R12: ff506ca15ff33b58
R13: ffffffff84bc79a3 R14: ff506ca15ff33b38 R15: 0000000000000000
ORIG_RAX: ff506ca15ff33a80 CS: ff506ca15ff33c78 SS: 0000
#9 [ff506ca15ff33c18] xas_load at ffffffff84b49a7f
#10 [ff506ca15ff33c28] __filemap_get_folio at ffffffff840985da
#11 [ff506ca15ff33ce8] swap_cache_get_folio at ffffffff841119db
#12 [ff506ca15ff33d18] do_swap_page at ffffffff840dbd21
#13 [ff506ca15ff33db8] __handle_mm_fault at ffffffff840ddee3
#14 [ff506ca15ff33e88] handle_mm_fault at ffffffff840de55d
#15 [ff506ca15ff33ec8] do_user_addr_fault at ffffffff83e93247
#16 [ff506ca15ff33f20] exc_page_fault at ffffffff84bc711d
#17 [ff506ca15ff33f50] asm_exc_page_fault at ffffffff84c00b77
Tried various patches proposed on this thread chain.. but no luck so far.
Looks like its stuck in following loop forever causing softlockup/panic:
if (!folio_try_get_rcu(folio))
goto repeat;
Looking at the crash dump, mapping->host became NULL. Not sure what exactly is happening.
Welcome any ideas to track it down further.
struct address_space {
host = 0x0,
i_pages = {
xa_lock = {
{
rlock = {
raw_lock = {
{
val = {
counter = 0
},
{
locked = 0 '\000',
pending = 0 '\000'
},
{
locked_pending = 0,
tail = 0
}
}
}
}
}
},
xa_flags = 1,
xa_head = 0xff3d8e7f9ca41daa
},
invalidate_lock = {
count = {
counter = 0
},
owner = {
counter = 0
},
osq = {
tail = {
counter = 0
}
},
wait_lock = {
raw_lock = {
{
val = {
counter = 0
},
{
locked = 0 '\000',
pending = 0 '\000'
},
{
locked_pending = 0,
tail = 0
}
}
}
},
wait_list = {
next = 0x0,
prev = 0x0
}
},
gfp_mask = 0,
i_mmap_writable = {
counter = 0
},
i_mmap = {
rb_root = {
rb_node = 0x0
},
rb_leftmost = 0x0
},
i_mmap_rwsem = {
count = {
counter = 0
},
owner = {
counter = 0
},
osq = {
tail = {
counter = 0
}
},
wait_lock = {
raw_lock = {
{
val = {
counter = 0
},
{
locked = 0 '\000',
pending = 0 '\000'
},
{
locked_pending = 0,
tail = 0
}
}
}
},
wait_list = {
next = 0x0,
prev = 0x0
}
},
nrpages = 1897,
writeback_index = 0,
a_ops = 0xffffffff85044560,
flags = 32,
wb_err = 0,
private_lock = {
{
rlock = {
raw_lock = {
{
val = {
counter = 0
},
{
locked = 0 '\000',
pending = 0 '\000'
},
{
locked_pending = 0,
tail = 0
}
}
}
}
}
},
private_list = {
next = 0x0,
prev = 0x0
},
private_data = 0x0
}
Thanks,
Badari
