Hi Andrew,
On 1/28/07, Andrew Morton <[email protected]> wrote:
This gets its local interrupt state mucked up.
BUG: sleeping function called from invalid context at mm/slab.c:3038
in_atomic():0, irqs_disabled():1
no locks held by init/1.
irq event stamp: 656902
hardirqs last enabled at (656901): [<c015f48b>] mod_zone_page_state+0x4b/0x50
hardirqs last disabled at (656902): [<c0171f54>] cache_alloc_refill+0x384/0x6a0
softirqs last enabled at (650628): [<c03a6317>] unix_release_sock+0x67/0x220
softirqs last disabled at (650626): [<c03cfe8e>] _write_lock_bh+0xe/0x40
[<c0103f7a>] show_trace_log_lvl+0x1a/0x30
[<c0104682>] show_trace+0x12/0x20
[<c0104736>] dump_stack+0x16/0x20
[<c01175ea>] __might_sleep+0xba/0xd0
[<c017262f>] kmem_cache_alloc+0xaf/0xd0
[<c0172131>] cache_alloc_refill+0x561/0x6a0
[<c0172574>] kmem_cache_zalloc+0xe4/0xf0
[<c011cb49>] copy_process+0x89/0x1280
[<c011dfcb>] do_fork+0x6b/0x1c0
[<c0100e13>] sys_clone+0x33/0x40
[<c0102edc>] sysenter_past_esp+0x5d/0x99
Hmm, alloc_slabmgmt calls kmem_cache_alloc with interrupts disabled
which triggers the warning. We won't deadlock though as we enable
interrupts in kmem_getpages in case we need to refill
cachep->slabp_cache. So the debug check is bogus when calling
kmem_cache_alloc within the slab allocator, I think.
I'll whack it some more and resend. Thanks Andrew!
Pekka
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