[PATCH] Add FAQ How do I fix find_fast_cwd warnings?
Tue Nov 14 20:52:00 GMT 2017
On 2017-11-14 02:29, Corinna Vinschen wrote:
> On Nov 13 11:51, Brian Inglis wrote:
>> On 2017-11-13 10:12, Brian Inglis wrote:
> Please send this as `git format-patch' with commit message and all.
One more diff for comment, and I could use some pointer on how to build htdocs
html from doc xml, and whether I need to concatenate the screen ulinks to get
them to render as a single line, which could be answered by the build.
>> + <para>This happens when the Cygwin release you installed can not find out
>> + how to get your current directory from the Windows release you are
>> + using.</para>
> I think this paragraph raises more questions than it answers. Of course
> Cygwin still can get the CWD, just not in the preferred way. Even if
> you change it to more technically correct terms, it doesn't give any
> useful info for users. Let's just drop it.
Reworded to say that it the issue may not be serious, but may be a performance
impact, to put the issue into perspective, and give the user some context.
I think your comment applies best to the message itself. ;^>
Perhaps we should consider dropping it, or rewording to be less alarming?
>> + <para>As Cygwin is a volunteer project, and we can not provide support for
>> + older releases installed by projects or products, but would like to be
>> + able to follow up to reduce reports of these issues if possible, it
>> + would be helpful if you would send us a quick
>> + <ulink url="mailto:email@example.com?subject=Source%20of%20application%20providing%20Cygwin%20warning%20about%20FAST_CWD">
>> + email</ulink> to let us know where you obtained the application
>> + which installed the older Cygwin release: whether it was purchased from
>> + a vendor or a project downloaded from the Internet, any related web
>> + pages, or other details you may have readily available.</para>
> Do we really want all this information? It should be sufficient to know
> the name of the project, so it's in the records for later reference.
> But we won't follow up on this anyway. There are just too many
> well-meaning, but short-lived TPPs on the web using Cygwin under the
Scrunched, but I am always reminded of the White Knight's song in Alice
when users are asked the name of a project or product e.g. "McAfee"!
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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diff --git a/winsup/doc/faq-using.xml b/winsup/doc/faq-using.xml
index b6b152e4e..6be533652 100644
@@ -1419,4 +1419,64 @@ such as virtual memory paging and file caching.</para>
difficult to make <literal>fork()</literal> work reliably.</para>
+ <question><para>How do I fix <literal>find_fast_cwd</literal> warnings?</para></question>
+ <para>Older Cygwin releases asked users to report problems to the mailing
+ list with the message:</para>
+ <screen>find_fast_cwd: WARNING: Couldn't compute FAST_CWD pointer. Please report
+ this problem to the public mailing list
+ <ulink url="mailto:firstname.lastname@example.org">
+ <para>Recent Cygwin releases changed this to the message:</para>
+ <screen>This typically occurs if you're using an older Cygwin version on a newer Windows.
+ Please update to the latest available Cygwin version from
+ <ulink url="https://cygwin.com/">
+ If the problem persists, please see
+ <ulink url="https://cygwin.com/problems.html">
+ <para>This is usually not a serious issue, just a warning that Cygwin
+ performance may be affected, when the Cygwin release you installed can
+ not find a quick way to get your current directory from the Windows
+ release you are using.</para>
+ <para>Unfortunately some projects and products still distribute older
+ Cygwin releases which may not fully support newer Windows releases,
+ instead of installing the current release from the Cygwin project.
+ They also may not provide any obvious way to keep the Cygwin packages
+ their application uses up to date with fixes for security issues and
+ <para>The fix is simply downloading and running Cygwin Setup, following the
+ instructions in the Internet Setup section of
+ <ulink url="https://cygwin.com/cygwin-ug-net/setup-net.html#internet-setup">
+ Setting Up Cygwin</ulink> in the Cygwin User's Guide.</para>
+ <para>When running Setup, you should not change most of the values
+ presented, just select the <literal>Next</literal> button in most
+ cases, as you already have a Cygwin release installed and only want to
+ upgrade your current installation.
+ You should make your own selection if the internet connection to your
+ system requires a proxy; and you must always pick an up to date Cygwin
+ download (mirror) site, preferably the site nearest to your system for
+ faster downloads, as shown with more details to help you choose on the
+ <ulink url="https://cygwin.com/mirrors.html">
+ Mirror Sites</ulink> web page.</para>
+ <para>Cygwin Setup will download and apply updates to all packages required
+ for Cygwin itself and installed applications.
+ Any problems with applying updates, or the application after updates,
+ should be reported to the project or product vendor for follow up
+ <para>As Cygwin is a volunteer project, and we can not provide support for
+ older releases installed by projects or products, but would like to be
+ able to follow up to reduce reports of these issues if possible, it
+ would be helpful if you would send us a quick
+ <ulink url="mailto:email@example.com?subject=Application%20with%20old%20Cygwin%20warning%20about%20FAST_CWD">
+ email</ulink> to let us know what project or product you installed
+ with the older Cygwin release.</para>
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