Re: [PATCH v2 1/5] blk-cgroup: add a new helper blkg_print_dev_name()

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Hi,

在 2024/10/08 13:01, Christoph Hellwig 写道:
On Tue, Oct 08, 2024 at 09:39:05AM +0800, Yu Kuai wrote:
Hi,

在 2024/10/01 1:11, Tejun Heo 写道:
Hello,

On Mon, Sep 30, 2024 at 04:52:58PM +0800, Yu Kuai wrote:
+static inline bool blkg_print_dev_name(struct seq_file *sf,
+				       struct blkcg_gq *blkg)
+{
+	struct gendisk *disk = blkg->q->disk;
+
+	if (!disk)
+		return false;
+
+	seq_printf(sf, "%u:%u", disk->major, disk->first_minor);
+	return true;
+}
+

I wonder whether we just should add a name field to disk.


Of course we can, however, I'm not sure if this is better, because
this field is not used in the fast path.

Struct gendisk does have a (disk_)name field aleady.

Yes, but this name is not major and minor(for example, sda instead of
8:0), Tejun was probably talking about major and minor name field.

Thanks,
Kuai


.






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