Messages in this thread |  | | Date | Wed, 25 Oct 2000 23:52:08 +0200 | From | Roger Larsson <> | Subject | Re: test10-pre4: deadlock in VM? |
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Hi,
I noted that even try_to_free_buffers locks lru_list_lock. Then it tries to lock some others - maybe one of the other treads got one of those (hash_table_lock, free_list[index].lock) It fits with that proc 4 it executes in the beginning of try_to_free_buffers, does it move? Or is it stuck at a spin lock there - which one? disassembly of try_to_free_buffers?
/RogerL
Rajagopal Ananthanarayanan wrote: > > Tigran Aivazian wrote: > > > > Hi guys, > > > > When running SPEC SFS tests against 2.4.0-test10-pre4 on a 4-way SMP > > machine with 6G RAM (highmem+PAE enabled) I got > > > > __alloc_pages: 0-order allocation failed. > > > > (probably coming from nfsd, why don't we print eip of the caller there?) > > > > and the machine locked up (but pingable). So I entered kdb and got stack > > traces of all running proceeses: > > Hmm. It appears that some of the processes are stuck on this > part of page_launder: > > /* > * Re-take the spinlock. Note that we cannot > * unlock the page yet since we're still > * accessing the page_struct here... > */ > spin_lock(&pagemap_lru_lock); > > It will be interesting to see what's going on in each of the cpus. > Use "cpu x" x=0,1,2,3 on your 4 cpu system to switch to cpu x, > and just type "bt" on each cpu. Also, it will be good to see what > kswapd (pid 2) is upto ... > > -------------------------------------------------------------------------- > Rajagopal Ananthanarayanan ("ananth") > Member Technical Staff, SGI. > -------------------------------------------------------------------------- > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > Please read the FAQ at http://www.tux.org/lkml/
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