On Fri, Nov 16, 2018 at 03:49:06PM +0800, Ming Lei wrote:
On Fri, Nov 16, 2018 at 01:52:05AM -0500, Sasha Levin wrote:
On Fri, Nov 16, 2018 at 11:28:25AM +0800, Ming Lei wrote:
> Even though .mq_kobj, ctx->kobj and q->kobj share same lifetime
> from block layer's view, actually they don't because userspace may
> grab one kobject anytime via sysfs, so each kobject's lifetime has
> to be independent, then the objects(mq_kobj, ctx) which hosts its
> own kobject have to be allocated dynamically.
>
> This patch fixes kernel panic issue during booting when DEBUG_KOBJECT_RELEASE
> is enabled.
>
> Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
What does this patch depend on? It doesn't apply to Linus's tree nor to
the block tree.
Also, could you please cc lkml with patches?
It depends on for-4.21/block.
And in particular on commit 392546aed22 ("blk-mq: separate number of
hardware queues from nr_cpu_ids") which isn't tagged for stable nor
looks like stable material, so this proposed patch doesn't backport
cleanly to any of the stable trees.
--
Thanks,
Sasha
