Messages in this thread Patches in this message | | | Date | Mon, 16 Jan 2012 09:23:36 -0200 | Subject | Re: Re: Re: XFS deadlock fixed? | From | Kelbel Junior <> |
| |
Hello, everybody. It appeared that same error message when using kernel version 2.6.38.8 ...
Several lines in /var/log/messages with: kernel: XFS: possible memory allocation deadlock in kmem_alloc (mode: 0x250)
Does anyone know know if this bug has been fixed in newer versions of Linux kernel? 3.x maybe?
Thanks. Kelbel Junior
2011/5/11 Christoph Hellwig <>
And here's the actual patch, sorry:
Index: linux-2.6/fs/xfs/linux-2.6/kmem.c =================================================================== --- linux-2.6.orig/fs/xfs/linux-2.6/kmem.c 2011-05-11 17:29:51.729191621 +0200
+++ linux-2.6/fs/xfs/linux-2.6/kmem.c 2011-05-11 17:30:22.915689382 +0200 @@ -56,10 +56,12 @@ kmem_alloc(size_t size, unsigned int __n ptr = kmalloc(size, lflags); if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
return ptr; - if (!(++retries % 100)) + if (!(++retries % 100)) { xfs_err(NULL, "possible memory allocation deadlock in %s (mode:0x%x)", __func__, lflags); + dump_stack(); + } congestion_wait(BLK_RW_ASYNC, HZ/50); } while (1); } @@ -112,10 +114,12 @@ kmem_zone_alloc(kmem_zone_t *zone, unsig ptr = kmem_cache_alloc(zone, lflags); if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
return ptr; - if (!(++retries % 100)) + if (!(++retries % 100)) { xfs_err(NULL, "possible memory allocation deadlock in %s (mode:0x%x)", __func__, lflags); + dump_stack(); + } congestion_wait(BLK_RW_ASYNC, HZ/50); } while (1); }
2011/5/11 Christoph Hellwig <>
You're probably running into a different issue. Any chance you can try the attached patch to see where you're stuck exactly?
Also in case you're using slub (CONFIG_SLUB) can you check if it still
happens when using slab (CONFIG_SLAB) instead?
2011/5/10 Felipe Wilhelms Damasio - Taghos <>
Hi Mr. Hellwig,
I saw the XFS deadlock thread regarding 2.6.38:
http://www.linux.sgi.com/archives/xfs/2011-03/msg00185.html
I'm seeing too in 2.6.38.4. A lot of
XFS: possible memory allocation deadlock in kmem_alloc (mode:0x250)
I checked the changelog for 2.6.38.6 and can't be sure if the fix got in...could you tell me if it did?
Thanks,
--
Felipe Wilhelms Damasio
TAGHOS - Tecnologia Rua Prof. Alvaro Alvim, 211 Porto Alegre - RS - (51) 3239-3180 www.taghos.com.br <http://www.taghos.com.br/>
| |