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Date:      Sun, 12 Jul 2020 08:37:51 -0700
From:      bob prohaska <fbsd@www.zefox.net>
To:        freebsd-current@freebsd.org
Subject:   Re: Is there any error checking on swap?
Message-ID:  <20200712153751.GA64898@www.zefox.net>
In-Reply-To: <20200712072911.GG4213@funkthat.com>
References:  <20200712033332.GA63411@www.zefox.net> <20200712072911.GG4213@funkthat.com>

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On Sun, Jul 12, 2020 at 12:29:12AM -0700, John-Mark Gurney wrote:
> bob prohaska wrote this message on Sat, Jul 11, 2020 at 20:33 -0700:
> > Is there any error checking on swap traffic, along the lines of
> > a checksum or parity test? 
> > 
> > Just curious what happens if a page written out is corrupted  when
> > it comes back.
> 
> Looks like it doesn't:
> https://svnweb.freebsd.org/base/head/sys/vm/swap_pager.c?annotate=361965#l1389
> 

Certainly nothing about parity or checksums in the comments.
All faith in the hardware, I guess....

Thanks for writing!

bob prohaska




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