Messages in this thread |  | | Date | Wed, 4 Dec 2013 13:32:20 -0800 | From | Andrew Morton <> | Subject | Re: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:616 |
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On Wed, 04 Dec 2013 16:59:38 +0800 Axel Lin <axel.lin@ingics.com> wrote:
> > > > Please add a lot more printk's so we can narrow it down further? I'd > > use something like > > > > printk(%d: %d\n", __LINE__, preempt_count()); > > > > (note: preempt_count(), not in_atomic()) > > > > Paste that all over the place so we can see which statement is doing > > the wrong thing. > > Below is the code ( to show the line number ): > > 459 int add_to_page_cache_locked(struct page *page, struct address_space > *mapping, > 460 pgoff_t offset, gfp_t gfp_mask) > 461 { > 462 int error; > 463 > 464 VM_BUG_ON(!PageLocked(page)); > 465 VM_BUG_ON(PageSwapBacked(page)); > 466 > 467 printk("%d: %d\n", __LINE__, preempt_count()); > 468 error = mem_cgroup_cache_charge(page, current->mm, > 469 gfp_mask & > GFP_RECLAIM_MASK); > 470 printk("%d: %d\n", __LINE__, preempt_count()); > 471 if (error) > 472 return error; > 473 > 474 error = radix_tree_maybe_preload(gfp_mask & > ~__GFP_HIGHMEM); > 475 printk("%d: %d\n", __LINE__, preempt_count()); > 476 if (error) { > 477 mem_cgroup_uncharge_cache_page(page); > 478 return error; > 479 } > 480 > 481 page_cache_get(page); > 482 page->mapping = mapping; > 483 page->index = offset; > 484 > 485 printk("%d: %d\n", __LINE__, preempt_count()); > 486 spin_lock_irq(&mapping->tree_lock); > 487 printk("%d: %d\n", __LINE__, preempt_count()); > 488 error = radix_tree_insert(&mapping->page_tree, offset, > page); > 489 printk("%d: %d\n", __LINE__, preempt_count()); > 490 radix_tree_preload_end(); > 491 printk("%d: %d\n", __LINE__, preempt_count()); > 492 if (unlikely(error)) > 493 goto err_insert; > 494 printk("%d: %d\n", __LINE__, preempt_count()); > 495 mapping->nrpages++; > 496 printk("%d: %d\n", __LINE__, preempt_count()); > 497 __inc_zone_page_state(page, NR_FILE_PAGES); > 498 printk("%d: %d\n", __LINE__, preempt_count()); > 499 spin_unlock_irq(&mapping->tree_lock); > 500 printk("%d: %d\n", __LINE__, preempt_count()); > 501 trace_mm_filemap_add_to_page_cache(page); > 502 printk("%d: %d\n", __LINE__, preempt_count()); > 503 return 0; > 504 err_insert: > 505 page->mapping = NULL; > 506 /* Leave page->index set: truncation relies upon it */ > 507 spin_unlock_irq(&mapping->tree_lock); > 508 mem_cgroup_uncharge_cache_page(page); > 509 page_cache_release(page); > 510 printk("%d: %d\n", __LINE__, preempt_count()); > 511 return error; > 512 } > > Below is the output log: > > VFS: Mounted root (jffs2 filesystem) on device 31:1. > devtmpfs: mounted > Freeing unused kernel memory: 92K (003a8000 - 003bf000) > 467: 0 > 470: 0 > 475: 1 > 485: 1 > 487: 2 > 489: 2 > 491: 1 > 494: 1 > 496: 1 > 498: 1 > 500: 0 > 502: 0 > 467: 0 > 470: 0 > 475: 1 > 485: 1 > 487: 2 > 489: 2 > 491: 1 > 494: 1 > 496: 1 > 498: 1 > 500: 0 > 502: 0 > 467: 0 > 470: 0 > 475: 1 > 485: 1 > 487: 2 > 489: 2 > 491: 1 > 494: 1 > 496: 1 > 498: 1 > 500: 1
blam. spin_unlock_irq(&mapping->tree_lock) failed to decrement preempt_count(). What the heck.
What architecture is this? Please send the full .config.
And exactly which kernel version is in use?
Thanks.
> 502: 1 > BUG: sleeping function called from invalid context at kernel/locking/mutex.c:616 > in_atomic(): 1, irqs_disabled(): 128, pid: 1, name: swapper > 1 lock held by swapper/1:
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