Re: Kernel panic when scrub is used
On Mon, Feb 18, 2013 at 12:53:28PM -0500, Jérôme Poulin wrote:
http://tinypic.com/r/2r3xdvl/6
At the top of the listing there's apparent trace of a WARN_ON issued and
it's in read_extent_buffer
4660 void read_extent_buffer(struct extent_buffer *eb, void *dstv,
4661 unsigned long start,
4662 unsigned long len)
4663 {
4664 size_t cur;
4665 size_t offset;
4666 struct page *page;
4667 char *kaddr;
4668 char *dst = (char *)dstv;
4669 size_t start_offset = eb-start ((u64)PAGE_CACHE_SIZE - 1);
4670 unsigned long i = (start_offset + start) PAGE_CACHE_SHIFT;
4671
4672 WARN_ON(start eb-len);
4673 WARN_ON(start + len eb-start + eb-len);
4674
4675 offset = (start_offset + start) ((unsigned long)PAGE_CACHE_SIZE
- 1);
4676
4677 while (len 0) {
4678 page = extent_buffer_page(eb, i);
4679
4680 cur = min(len, (PAGE_CACHE_SIZE - offset));
4681 kaddr = page_address(page);
4682 memcpy(dst, kaddr + offset, cur);
first segfault happens at memcpy, it's likely a bad value in 'offset'
calculated from bogus values in 'eb'. With some luck we can guess at which page
it happend (which of RBX=11, RCX=2, RDX=1 holds value of 'i') or what are
values of other variables.
4683
4684 dst += cur;
4685 len -= cur;
4686 offset = 0;
4687 i++;
4688 }
4689 }
Was the filesystem created with nodesize 4k ?
david
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Re: Kernel panic when scrub is used
On Wed, Feb 20, 2013 at 1:42 PM, Jérôme Poulin jeromepou...@gmail.com wrote: On Wed, Feb 20, 2013 at 8:11 AM, David Sterba dste...@suse.cz wrote: Was the filesystem created with nodesize 4k ? Yes; 64KB. I just noticed I didn't mention that I have raid5/6 code merged in but it never was used on the partition I scrubbed. -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kernel panic when scrub is used
On 02/18/13 18:14, Jérôme Poulin wrote: I experience a kernel panic with General protection fault when doing a scrub on Kernel 3.8-rc7. Here is a screenshot: http://tinypic.com/r/34r6nad/6 I'd love to see the first stacktrace... The weird part is that the scrub completes from initramfs, but when system is fully booted, is kernel panics every time in the low percentage. (10%) -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kernel panic when scrub is used
Here you go, I also added 2 other screenshots of the same problem. http://tinypic.com/r/5ckgug/6 http://tinypic.com/r/t0i9t4/6 http://tinypic.com/r/2r3xdvl/6 On Mon, Feb 18, 2013 at 12:37 PM, Arne Jansen li...@die-jansens.de wrote: On 02/18/13 18:14, Jérôme Poulin wrote: I experience a kernel panic with General protection fault when doing a scrub on Kernel 3.8-rc7. Here is a screenshot: http://tinypic.com/r/34r6nad/6 I'd love to see the first stacktrace... The weird part is that the scrub completes from initramfs, but when system is fully booted, is kernel panics every time in the low percentage. (10%) -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kernel panic when scrub is used
On 02/18/13 18:53, Jérôme Poulin wrote: Here you go, I also added 2 other screenshots of the same problem. http://tinypic.com/r/5ckgug/6 http://tinypic.com/r/t0i9t4/6 http://tinypic.com/r/2r3xdvl/6 do you have any idea how I can reproduce it here? -Arne On Mon, Feb 18, 2013 at 12:37 PM, Arne Jansen li...@die-jansens.de wrote: On 02/18/13 18:14, Jérôme Poulin wrote: I experience a kernel panic with General protection fault when doing a scrub on Kernel 3.8-rc7. Here is a screenshot: http://tinypic.com/r/34r6nad/6 I'd love to see the first stacktrace... The weird part is that the scrub completes from initramfs, but when system is fully booted, is kernel panics every time in the low percentage. (10%) -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
