Messages in this thread Patch in this message | | | Date | Sat, 12 May 2007 17:42:37 +0100 | Subject | Re: [Bug 8464] New: autoreconf: page allocation failure. order:2, mode:0x84020 | From | (Mel Gorman) |
| |
On (12/05/07 10:11), Nicolas Mailhot didst pronounce: > Le vendredi 11 mai 2007 à 21:36 +0100, Mel Gorman a écrit : > > > I'm pretty sure I have. I recreated the tree and reverted the same patch as > > you and regenerated the diff below. I sent it to myself and it appeared ok > > and another automated system was able to use it. > > > > In case it's a mailer problem, the patch can be downloaded from > > http://www.csn.ul.ie/~mel/kswapd-minorder.patch . > > This one applies, but the kernel still has allocation failures (I just > found rpm -Va was a good trigger). So so far we have two proposed fixes > none of which work >
Sorry about this. What is most preplexing is that the memory was free. In your log we see;
> May 12 10:00:47 rousalka kernel: DMA: 6*4kB 4*8kB 9*16kB 3*32kB 6*64kB 7*128kB 5*256kB 0*512kB 1*1024kB 0*2048kB 1*4096kB = 7976kB > May 12 10:00:47 rousalka kernel: DMA32: 2619*4kB 27*8kB 6*16kB 0*32kB 0*64kB 2*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 11556kB
and
> May 12 10:00:47 rousalka kernel: DMA: 6*4kB 4*8kB 9*16kB 3*32kB 6*64kB 7*128kB 5*256kB 0*512kB 1*1024kB 0*2048kB 1*4096kB = 7976kB > May 12 10:00:47 rousalka kernel: DMA32: 1651*4kB 29*8kB 10*16kB 0*32kB 0*64kB 2*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 7764kB
order-2 (at least 19 pages but more are there) and higher pages were free and this was a NORMAL allocation. It should also be above watermarks so something screwy is happening
*peers suspiciously*
Can you try the following patch on top of the kswapd patch please? It is also available from http://www.csn.ul.ie/~mel/watermarks.patch
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.21-mm2-revertmd/mm/page_alloc.c linux-2.6.21-mm2-watermarks/mm/page_alloc.c --- linux-2.6.21-mm2-revertmd/mm/page_alloc.c 2007-05-11 21:16:57.000000000 +0100 +++ linux-2.6.21-mm2-watermarks/mm/page_alloc.c 2007-05-12 17:34:10.000000000 +0100 @@ -1627,7 +1627,7 @@ restart: /* This allocation should allow future memory freeing. */ rebalance: - if (((p->flags & PF_MEMALLOC) || unlikely(test_thread_flag(TIF_MEMDIE))) + if (((p->flags & PF_MEMALLOC) || unlikely(test_thread_flag(TIF_MEMDIE) || !wait)) && !in_interrupt()) { if (!(gfp_mask & __GFP_NOMEMALLOC)) { nofail_alloc: @@ -1636,7 +1636,7 @@ nofail_alloc: zonelist, ALLOC_NO_WATERMARKS); if (page) goto got_pg; - if (gfp_mask & __GFP_NOFAIL) { + if (gfp_mask & __GFP_NOFAIL && wait) { congestion_wait(WRITE, HZ/50); goto nofail_alloc; } -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |