Re: [PATCH] mm/slab: Increase width of first /proc/slabinfo column

Tobin C. Harding
2019-02-01T02:58:25Z

On Thu, Jan 31, 2019 at 06:43:10PM -0800, Matthew Wilcox wrote:
> On Fri, Feb 01, 2019 at 11:42:42AM +1100, Tobin C. Harding wrote:
> > Currently when displaying /proc/slabinfo if any cache names are too long
> > then the output columns are not aligned. We could do something fancy to
> > get the maximum length of any cache name in the system or we could just
> > increase the hardcoded width. Currently it is 17 characters. Monitors
> > are wide these days so lets just increase it to 30 characters.
>
> I had a proposal some time ago to turn the slab name from being kmalloced
> to being an inline 16 bytes (with some fun hacks for cgroups). I think
> that's a better approach than permitting such long names. For example,
> ext4_allocation_context could be shortened to ext4_alloc_ctx without
> losing any expressivity.
>
> Let me know if you can't find that and I'll try to dig it up.

Thanks Willy, I'll try and find it and bring it back to life.

Cheers,
Tobin.