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From: Greg KH <[email protected]>
To: "zhanghongtao (A)" <[email protected]>
Cc: [email protected], [email protected],
	[email protected], [email protected],
	[email protected]
Subject: Re: [PATCH] drivers:uio: Fix system crashes during driver switchover
Date: Wed, 11 May 2022 12:09:33 +0200	[thread overview]
Message-ID: <YnuLXTu1wXvCbP/[email protected]> (raw)
In-Reply-To: <[email protected]>

A: http://en.wikipedia.org/wiki/Top_post
Q: Were do I find info about this thing called top-posting?
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

A: No.
Q: Should I include quotations after my reply?

http://daringfireball.net/2007/07/on_top

On Wed, May 11, 2022 at 04:51:11PM +0800, zhanghongtao (A) wrote:
> Thanks for your reply.
> I looked through the historical emails and thought I was not the
> same problem as his.
> After the driver is switched, the application can still operate
> on the mapped address, which causes the system to crash.
> The application is not aware of the driver's switchover.
> The solution I can think of is to block the switch and wait for
> the application to release before switching, as shown in the patch.
> So want to seek help from the community, how to solve it better?
> Is there a better way?

A better way to do what?  I have no context here at all, sorry.

What is "switching" the driver?  If it is root by doing a bind/unbind,
then you are on your own and have to do that very carefully, right?

thanks,

greg k-h

  reply	other threads:[~2022-05-11 10:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-11  6:34 [PATCH] drivers:uio: Fix system crashes during driver switchover zhanghongtao (A)
2022-05-11  6:48 ` Greg KH
2022-05-11  8:51   ` zhanghongtao (A)
2022-05-11 10:09     ` Greg KH [this message]
2022-05-17  7:34     ` Greg KH
2022-05-11 12:45 ` Christoph Hellwig

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