linux-kernel - Re: Possible bug report: kernel 6.5.0/6.5.1 high load when CIFS share is mounted (cifsd-cfid-laundromat in"D" state)

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Message-ID: <b8e37bfc992532038f9d562f5596cbf3.pc@manguebit.com>
Date:   Mon, 23 Oct 2023 11:07:01 -0300
From:   Paulo Alcantara <pc@...guebit.com>
To:     "Dr. Bernd Feige" <bernd.feige@...klinik-freiburg.de>,
        "smfrench@...il.com" <smfrench@...il.com>,
        "matoro_mailinglist_kernel@...oro.tk" 
        <matoro_mailinglist_kernel@...oro.tk>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-cifs@...r.kernel.org" <linux-cifs@...r.kernel.org>,
        "bagasdotme@...il.com" <bagasdotme@...il.com>,
        "paul@...krain42.org" <paul@...krain42.org>,
        "tom@...pey.com" <tom@...pey.com>,
        "ronniesahlberg@...il.com" <ronniesahlberg@...il.com>,
        "bharathsm@...rosoft.com" <bharathsm@...rosoft.com>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        "brian.pardy@...il.com" <brian.pardy@...il.com>,
        "nspmangalore@...il.com" <nspmangalore@...il.com>
Subject: Re: Possible bug report: kernel 6.5.0/6.5.1 high load when CIFS
 share is mounted (cifsd-cfid-laundromat in"D" state)

"Dr. Bernd Feige" <bernd.feige@...klinik-freiburg.de> writes:

> I can confirm that the patches apply cleanly on 6.5.8 and help a lot
> with the issue here (vers=3.1.1, gentoo client, MS AD server with DFS).

Thanks for testing it.

Steve, I would suggest below commits for v6.5.y

	238b351d0935 ("smb3: allow controlling length of time directory entries are cached with dir leases")
	6a50d71d0fff ("smb3: allow controlling maximum number of cached directories")
	2da338ff752a ("smb3: do not start laundromat thread when dir leases  disabled")
	e95f3f744650 ("smb: client: make laundromat a delayed worker")
	81ba10959970 ("smb: client: prevent new fids from being removed by laundromat")

If OK, please ask stable team to pick those up.