Jens Axboe <axboe@xxxxxxxxx> writes: > If a driver leaves the limit settings as the defaults, then we don't > initialize bdi->io_pages. This means that file systems may need to > work around bdi->io_pages == 0, which is somewhat messy. > > Initialize the default value just like we do for ->ra_pages. > > Cc: stable@xxxxxxxxxxxxxxx > Reported-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> When queued to submit, please let us know to drop fatfs workaround "fat-avoid-oops-when-bdi-io_pages==0.patch" in akpm series. Thanks. > --- > > diff --git a/block/blk-core.c b/block/blk-core.c > index d9d632639bd1..10c08ac50697 100644 > --- a/block/blk-core.c > +++ b/block/blk-core.c > @@ -539,6 +539,7 @@ struct request_queue *blk_alloc_queue(int node_id) > goto fail_stats; > > q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES; > + q->backing_dev_info->io_pages = VM_READAHEAD_PAGES; > q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK; > q->node = node_id; -- OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
