Messages in this thread | | | Subject | Re: Bounce buffer deadlock | Date | Fri, 29 Jun 2001 21:42:16 +0100 (BST) | From | Alan Cox <> |
| |
> Has anyone else seen a hang like this: > > bdflush() > flush_dirty_buffers() > ll_rw_block() > submit_bh(buffer X) > generic_make_request() > __make_request() > create_bounce() > alloc_bounce_page() > alloc_page() > try_to_free_pages() > do_try_to_free_pages() > page_launder() > try_to_free_buffers( , 2) -- i.e. wait for buffers > sync_page_buffers() > __wait_on_buffer(buffer X)
Whoops. We actually carefully set PF_MEMALLOC to avoid deadlocks here but if the buffer is laundered.... ummm
Looks like page_launder needs to be more careful
> I hit this in 2.4.6-pre6, and I don't see anything in the ac series to protect > against it.
Not this one no
Alan
- 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/
| |