linux-kernel - Re: [PATCH 3/3] xen: optimize xenbus driver for multiple concurrent xenstore accesses

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Tue, 10 Jan 2017 11:38:33 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 3/3] xen: optimize xenbus driver for multiple concurrent
 xenstore accesses


>> /*
>>  * xs_response_mutex is locked as long as we are processing one
>>  * message. state.in_msg will be true as long as we are holding the
>>  * lock in process_msg().
>
> Then in_msg is the same as mutex_is_locked(&xs_response_mutex). And if
> so, do we really need it?


Nevermind this. The lock can be held by others, obviously.

-boris