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Re: [RFC PATCH 00/30] Code tagging framework and applications
- To: Kent Overstreet <kent.overstreet@xxxxxxxxx>
- From: Jens Axboe <axboe@xxxxxxxxx>
- Date: Fri, 2 Sep 2022 14:23:34 -0600
- Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>, Yosry Ahmed <yosryahmed@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, dave@xxxxxxxxxxxx, Matthew Wilcox <willy@xxxxxxxxxxxxx>, liam.howlett@xxxxxxxxxx, void@xxxxxxxxxxxxx, juri.lelli@xxxxxxxxxx, ldufour@xxxxxxxxxxxxx, Peter Xu <peterx@xxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, mcgrof@xxxxxxxxxx, masahiroy@xxxxxxxxxx, nathan@xxxxxxxxxx, changbin.du@xxxxxxxxx, ytcoode@xxxxxxxxx, vincent.guittot@xxxxxxxxxx, dietmar.eggemann@xxxxxxx, Steven Rostedt <rostedt@xxxxxxxxxxx>, bsegall@xxxxxxxxxx, bristot@xxxxxxxxxx, vschneid@xxxxxxxxxx, Christoph Lameter <cl@xxxxxxxxx>, Pekka Enberg <penberg@xxxxxxxxxx>, Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>, 42.hyeyoo@xxxxxxxxx, glider@xxxxxxxxxx, elver@xxxxxxxxxx, dvyukov@xxxxxxxxxx, Shakeel Butt <shakeelb@xxxxxxxxxx>, Muchun Song <songmuchun@xxxxxxxxxxxxx>, arnd@xxxxxxxx, jbaron@xxxxxxxxxx, David Rientjes <rientjes@xxxxxxxxxx>, minchan@xxxxxxxxxx, kaleshsingh@xxxxxxxxxx, kernel-team@xxxxxxxxxxx, Linux-MM <linux-mm@xxxxxxxxx>, iommu@xxxxxxxxxxxxxxx, kasan-dev@xxxxxxxxxxxxxxxx, io-uring@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, linux-modules@xxxxxxxxxxxxxxx, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>
- Delivery-date: Fri, 02 Sep 2022 20:23:53 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 9/2/22 2:05 PM, Kent Overstreet wrote:
> On Fri, Sep 02, 2022 at 01:53:53PM -0600, Jens Axboe wrote:
>> I've complained about memcg accounting before, the slowness of it is why
>> io_uring works around it by caching. Anything we account we try NOT do
>> in the fast path because of it, the slowdown is considerable.
>
> I'm with you on that, it definitely raises an eyebrow.
>
>> You care about efficiency now? I thought that was relegated to
>> irrelevant 10M IOPS cases.
>
> I always did, it's just not the only thing I care about.
It's not the only thing anyone cares about.
--
Jens Axboe
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