linux-kernel - Re: [PATCH v3 05/16] ntb: ntb_test: ensure the link is up before trying to configure the mws

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 1 Aug 2017 14:07:31 -0400
From:   Jon Mason <jdmason@...zu.us>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     linux-ntb@...glegroups.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <Allen.Hubbe@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kurt Schwemmer <kurt.schwemmer@...rosemi.com>,
        Stephen Bates <sbates@...thlin.com>,
        Serge Semin <fancer.lancer@...il.com>
Subject: Re: [PATCH v3 05/16] ntb: ntb_test: ensure the link is up before
 trying to configure the mws

On Tue, Jul 25, 2017 at 02:57:42PM -0600, Logan Gunthorpe wrote:
> After the link tests, there is a race on one side of the test for
> the link coming up. It's possible, in some cases, for the test script
> to write to the 'peer_trans' files before the link has come up.
> 
> To fix this, we simply use the link event file to ensure both sides
> see the link as up before continuning.
> 
> Signed-off-by: Logan Gunthorpe <logang@...tatee.com>

This looks like a bug fix.  Assuming this is the case, I can pull it
out, add a "Fixes" line, and add it to my bug fixes branch.  Is this
the case?

Thanks,
Jon

> ---
>  tools/testing/selftests/ntb/ntb_test.sh | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/tools/testing/selftests/ntb/ntb_test.sh b/tools/testing/selftests/ntb/ntb_test.sh
> index 1c12b5855e4f..5fc7ad359e21 100755
> --- a/tools/testing/selftests/ntb/ntb_test.sh
> +++ b/tools/testing/selftests/ntb/ntb_test.sh
> @@ -333,6 +333,10 @@ function ntb_tool_tests()
>  	link_test $LOCAL_TOOL $REMOTE_TOOL
>  	link_test $REMOTE_TOOL $LOCAL_TOOL
>  
> +	#Ensure the link is up on both sides before continuing
> +	write_file Y $LOCAL_TOOL/link_event
> +	write_file Y $REMOTE_TOOL/link_event
> +
>  	for PEER_TRANS in $(ls $LOCAL_TOOL/peer_trans*); do
>  		PT=$(basename $PEER_TRANS)
>  		write_file $MW_SIZE $LOCAL_TOOL/$PT
> -- 
> 2.11.0
> 
> -- 
> You received this message because you are subscribed to the Google Groups "linux-ntb" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to linux-ntb+unsubscribe@...glegroups.com.
> To post to this group, send email to linux-ntb@...glegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/linux-ntb/20170725205753.4735-6-logang%40deltatee.com.
> For more options, visit https://groups.google.com/d/optout.