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From: Ravi Prakash Putchala <praks.putchala@gmail.com>
To: Greg KH <greg@kroah.com>
Cc: kernelnewbies@kernelnewbies.org
Subject: Re: fs.quota.warnings sysctl parameter usage
Date: Thu, 16 May 2019 19:59:41 +0530
Message-ID: <CABRTiai=KAWn_a5aWvPp9kCn757hm5HXvkN5kxMq+8nUBtu4FA@mail.gmail.com> (raw)
In-Reply-To: <20190515112636.GA11749@kroah.com>

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Thank you. This helps a lot. I will check it out.


On Wed, May 15, 2019 at 5:04 PM Greg KH <greg@kroah.com> wrote:

> On Wed, May 15, 2019 at 03:41:30PM +0530, Ravi Prakash Putchala wrote:
> > On Wed, May 15, 2019 at 1:46 PM Greg KH <greg@kroah.com> wrote:
> >
> > > On Wed, May 15, 2019 at 01:14:24PM +0530, Ravi Prakash Putchala wrote:
> > > > Hi,
> > > >
> > > > I am exploring fs sysctl parameters and unable to find the reference
> to
> > > > fs.quota.warnings parameter in the kernel source code. I tried
> searching
> > > > with fs.quota.warnings (ignoring case) and also
> sysctl_fs_quota_warnings.
> > > >
> > > > Could anyone please point me to the place in the kernel source where
> this
> > > > parameter is used?
> > >
> > > Look at the flag_print_warnings variable in fs/quota/dquot.c
> > >
> >
> > Thank you. But how do I associate it with fs.quota.warnings? Asking
> because
> > this would be useful for me to associate other sysctl parameters in
> > future.
>
> Step back a minute and think about how you create a sysctl entry.  It's
> with a call to register_sysctl_table(), right?  And what is the
> parameter of that function?  It takes a table that describes the sysctl
> directory structure.  And from that you can see the different quota
> sysctl entries and variables.
>
> Look at the sys_table and fs_table structures for that information,
> understand how they work and then you will be able to find any sysctl
> entry in the kernel source quite easily.
>
> hope this helps,
>
> greg k-h
>

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<div dir="ltr">Thank you. This helps a lot. I will check it out.<br><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 15, 2019 at 5:04 PM Greg KH &lt;<a href="mailto:greg@kroah.com">greg@kroah.com</a>&gt; wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, May 15, 2019 at 03:41:30PM +0530, Ravi Prakash Putchala wrote:<br>
&gt; On Wed, May 15, 2019 at 1:46 PM Greg KH &lt;<a href="mailto:greg@kroah.com" target="_blank">greg@kroah.com</a>&gt; wrote:<br>
&gt; <br>
&gt; &gt; On Wed, May 15, 2019 at 01:14:24PM +0530, Ravi Prakash Putchala wrote:<br>
&gt; &gt; &gt; Hi,<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; I am exploring fs sysctl parameters and unable to find the reference to<br>
&gt; &gt; &gt; fs.quota.warnings parameter in the kernel source code. I tried searching<br>
&gt; &gt; &gt; with fs.quota.warnings (ignoring case) and also sysctl_fs_quota_warnings.<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; Could anyone please point me to the place in the kernel source where this<br>
&gt; &gt; &gt; parameter is used?<br>
&gt; &gt;<br>
&gt; &gt; Look at the flag_print_warnings variable in fs/quota/dquot.c<br>
&gt; &gt;<br>
&gt; <br>
&gt; Thank you. But how do I associate it with fs.quota.warnings? Asking because<br>
&gt; this would be useful for me to associate other sysctl parameters in<br>
&gt; future.<br>
<br>
Step back a minute and think about how you create a sysctl entry.  It&#39;s<br>
with a call to register_sysctl_table(), right?  And what is the<br>
parameter of that function?  It takes a table that describes the sysctl<br>
directory structure.  And from that you can see the different quota<br>
sysctl entries and variables.<br>
<br>
Look at the sys_table and fs_table structures for that information,<br>
understand how they work and then you will be able to find any sysctl<br>
entry in the kernel source quite easily.<br>
<br>
hope this helps,<br>
<br>
greg k-h<br>
</blockquote></div>

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Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-15  7:44 Ravi Prakash Putchala
2019-05-15  8:16 ` Greg KH
2019-05-15 10:11   ` Ravi Prakash Putchala
2019-05-15 11:26     ` Greg KH
2019-05-16 14:29       ` Ravi Prakash Putchala [this message]

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