On Sat 04-07-15 11:12:00, Tejun Heo wrote:
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> Suggested-by: Jan Kara <jack@xxxxxxx>
> ---
> Hello,
>
> So, something like this. I'll resend this patch as part of a patch
> series once -rc1 drops.
Looks good. Thanks!
Honza
> fs/fs-writeback.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> --- a/fs/fs-writeback.c
> +++ b/fs/fs-writeback.c
> @@ -700,7 +700,7 @@ void wbc_account_io(struct writeback_con
>
> /**
> * inode_congested - test whether an inode is congested
> - * @inode: inode to test for congestion
> + * @inode: inode to test for congestion (may be NULL)
> * @cong_bits: mask of WB_[a]sync_congested bits to test
> *
> * Tests whether @inode is congested. @cong_bits is the mask of congestion
> @@ -710,6 +710,9 @@ void wbc_account_io(struct writeback_con
> * determined by whether the cgwb (cgroup bdi_writeback) for the blkcg
> * associated with @inode is congested; otherwise, the root wb's congestion
> * state is used.
> + *
> + * @inode is allowed to be NULL as this function is often called on
> + * mapping->host which is NULL for the swapper space.
> */
> int inode_congested(struct inode *inode, int cong_bits)
> {
--
Jan Kara <jack@xxxxxxx>
SUSE Labs, CR
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