Messages in this thread | | | Date | Tue, 16 Jul 2002 01:52:40 -0700 | From | Andrew Morton <> | Subject | Re: [BUG] loop.c oopses |
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Jens Axboe wrote: > > On Tue, Jul 16 2002, Andrew Morton wrote: > > William Lee Irwin III wrote: > > > > > > loop.c oopses when bio_copy() returns NULL. This was encountered while > > > running dbench 16 on a loopback-mounted reiserfs filesystem. > > > > ugh. GFP_NOIO is evil. I guess it's better to add __GFP_HIGH > > there, but it's not a happy solution. > > GFP_NOIO has __GFP_WAIT set, so bio_copy -> bio_alloc -> mempool_alloc > should never fail. Puzzled. >
Presumably the loop driver was called from within shrink_cache(), as PF_MEMALLOC. Those allocations can fail.
That's maybe wrong - if there are a decent number of pages under writeback then we should be able to just wait it out. But it gets tricky with the loop driver...
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