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Date:   Tue, 10 Aug 2021 21:30:23 +0200
From:   "Michael Kerrisk (man-pages)" <>
To:     Christian Brauner <>
Cc:, Alejandro Colomar <>,
        linux-fsdevel <>,
        lkml <>,
        linux-man <>,
        Christoph Hellwig <>
Subject: Re: Questions re the new mount_setattr(2) manual page

On 8/10/21 4:11 PM, Christian Brauner wrote:
> On Tue, Aug 10, 2021 at 09:12:14AM +0200, Michael Kerrisk (man-pages) wrote:
>> Hi Christian,
>> One more question...
>>>>       The propagation field is used to specify the propagation typ
>>>>       of the mount or mount tree.  Mount propagation options are
>>>>       mutually exclusive; that is, the propagation values behave
>>>>       like an enum.  The supported mount propagation types are:
>> The manual page text doesn't actually say it, but if the 'propagation'
>> field is 0, then this means leave the propagation type unchanged, 
>> right? This of course should be mentioned in the manual page.
> Yes, if none of the documented values is set the propagation is unchanged.

Thanks for the confirmation.



Michael Kerrisk
Linux man-pages maintainer;
Linux/UNIX System Programming Training:

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