Messages in this thread | | | Date | Fri, 17 Dec 2010 09:21:19 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH] writeback: skip balance_dirty_pages() for in-memory fs |
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On 12/17/2010 06:21 AM, Wu Fengguang wrote: > This avoids unnecessary checks and dirty throttling on tmpfs/ramfs. > > It also prevents > > [ 388.126563] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050 > > in the balance_dirty_pages tracepoint, which will call > > dev_name(mapping->backing_dev_info->dev) > > but shmem_backing_dev_info.dev is NULL. > > CC: Hugh Dickins<hughd@google.com> > Signed-off-by: Wu Fengguang<fengguang.wu@intel.com>
Acked-by: Rik van Riel <riel@redhat.com>
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