Messages in this thread | | | Subject | Re: nfs unhappiness with memory pressure | From | Trond Myklebust <> | Date | Mon, 05 Dec 2005 15:13:10 -0500 |
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On Mon, 2005-12-05 at 10:01 -0800, Kenny Simpson wrote: > Tested with rc5 - same results. It was suggested that I run slabtop when the system freezed, so > here is that info: (again, by hand, I'm getting another machine to use either netconsole or a > serial cable). > > Active / Total Objects (% used) : 478764 / 485383 (98.6%) > Active / Total Slabs (% used) : 14618 / 14635 (99.9%) > Active / Total Caches (% used) : 79 / 138 (57.2%) > Active / Total Size (% used) : 56663.79K / 57566.41K (98.4%) > Minimum / Average / Maximum Object : 0.01K / 0.12K / 128.00K > > OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME > 403088 403088 100% 0.06K 6832 59 27328K nfs_page > 30380 30380 100% 0.50K 4340 7 17360K nfs_write_data > 15134 15134 100% 0.27K 1081 14 4324K radix_tree_node > ... > > > The other thing is that the stack trace showsd slabtop as being halted in throttle_vm_writeout > while allocating memory, and the writetest was halted waiting to allocate memory.
Can somebody VM-savvy please explain how on earth they expect something like throttle_vm_writeout() to make progress? Shouldn't that thing at the very least be kicking pdflush every time it loops?
Cheers, Trond
> I'll get more detailed stack traces once I get the second machine set up. > > -Kenny > > > > > __________________________________ > Start your day with Yahoo! - Make it your home page! > http://www.yahoo.com/r/hs > - > 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/
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