Messages in this thread | | | From | Brian Pardy <> | Date | Mon, 18 Sep 2023 18:55:58 -0400 | 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) |
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[RS removed from CC due to bounce message]
On Wed, Sep 6, 2023 at 5:03 PM Brian Pardy <brian.pardy@gmail.com> wrote: > On Tue, Sep 5, 2023 at 9:01 PM Bagas Sanjaya <bagasdotme@gmail.com> wrote: > > Thanks for the regression report. But if you want to get it fixed, > > you have to do your part: perform bisection. See Documentation/admin-guide/bug-bisect.rst in the kernel sources for how to do that. > > > > Anyway, I'm adding it to regzbot: > > > > #regzbot ^introduced: v6.4..v6.5 > > #regzbot title: incorrect CPU utilization report (multiplied) when mounting CIFS > > Thank you for directing me to the bug-bisect documentation. Results below: > > # git bisect bad > d14de8067e3f9653cdef5a094176d00f3260ab20 is the first bad commit > commit d14de8067e3f9653cdef5a094176d00f3260ab20 > Author: Ronnie Sahlberg <lsahlber@redhat.com> > Date: Thu Jul 6 12:32:24 2023 +1000 > > cifs: Add a laundromat thread for cached directories > > and drop cached directories after 30 seconds > > Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> > Signed-off-by: Steve French <stfrench@microsoft.com> > > fs/smb/client/cached_dir.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++ > fs/smb/client/cached_dir.h | 1 + > 2 files changed, 68 insertions(+)
Is there any further information I can provide to aid in debugging this issue? Should I just expect incorrect load average reporting when a CIFS share is mounted on any kernel >6.5.0?
I'm not clear on the value or necessity of this "laundromat thread" - everything worked as expected before it was added - shall I just patch it out of my kernel builds going forward if there is no interest in fixing it? Is a .config option to disable it possible?
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