mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Tejun Heo <tj@kernel.org>
To: Imran Khan <imran.f.khan@oracle.com>
Cc: Greg KH <gregkh@linuxfoundation.org>, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH v2 1/2] kernfs: use kernfs_node specific mutex and spinlock.
Date: Fri, 7 Jan 2022 11:25:12 -1000	[thread overview]
Message-ID: <YdivuA12i3VU8zO/@slm.duckdns.org> (raw)
In-Reply-To: <03cb9939-efbb-1ce8-42f5-c167ac5246da@oracle.com>

Hello,

On Fri, Jan 07, 2022 at 11:01:55PM +1100, Imran Khan wrote:
> Could you please suggest me some current users of hashed locks ? I can
> check that code and modify my patches accordingly.

include/linux/blockgroup_lock.h seems to be one.

> As of now I have not found any standard benchmarks/workloads to show the
> impact of this contention. We have some in house DB applications where
> the impact can be easily seen.  Of course those applications can be
> modified to get the needed data from somewhere else or access sysfs less
> frequently but nonetheless I am trying to make the current locking
> scheme more scalable.

I don't think it needs to show up in one of the common benchmarks but what
the application does should make some sense. Which files are involved in the
contentions?

Thanks.

-- 
tejun

  parent reply	other threads:[~2022-01-07 21:25 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-03  8:45 [RFC PATCH v2 0/2] " Imran Khan
2022-01-03  8:45 ` [RFC PATCH v2 1/2] " Imran Khan
2022-01-03  9:54   ` Greg KH
2022-01-03 22:16     ` Imran Khan
2022-01-04  5:48       ` Imran Khan
2022-01-04  7:40       ` Greg KH
2022-01-06 20:30         ` Tejun Heo
2022-01-07 12:01           ` Imran Khan
2022-01-07 13:30             ` Greg KH
2022-01-07 21:25             ` Tejun Heo [this message]
2022-01-10 23:42               ` Imran Khan
2022-01-12 20:08                 ` Tejun Heo
2022-01-13  8:48                   ` Greg KH
2022-01-13 10:51                     ` Imran Khan
2022-01-03  8:45 ` [RFC PATCH v2 2/2] kernfs: Reduce contention around global per-fs kernfs_rwsem Imran Khan
2022-01-05  2:17   ` [kernfs] 3dd2a5f81a: INFO:trying_to_register_non-static_key kernel test robot

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YdivuA12i3VU8zO/@slm.duckdns.org \
    --to=tj@kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=imran.f.khan@oracle.com \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®