linux-kernel - [KVM PATCH v9 0/5] irqfd fixes and enhancements

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-next>] [day] [month] [year] [list]

Message-ID: <20090702153454.20186.99191.stgit@dev.haskins.net>
Date:	Thu, 02 Jul 2009 11:37:55 -0400
From:	Gregory Haskins <ghaskins@...ell.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, mst@...hat.com, avi@...hat.com,
	davidel@...ilserver.org
Subject: [KVM PATCH v9 0/5] irqfd fixes and enhancements

(Applies to kvm.git/master:1f9050fd)

The following is the latest attempt to fix the races in irqfd/eventfd, as
well as restore DEASSIGN support.  For more details, please read the patch
headers.

As always, this series has been tested against the kvm-eventfd unit test
and everything appears to be functioning properly. You can download this
test here:

ftp://ftp.novell.com/dev/ghaskins/kvm-eventfd.tar.bz2

Kind Regards,
-Greg

[Changelog:

	v9:
	   *) Re-split v8:1/3 into v9[1/5, 2/5, 3/5]
	   *) Fixed bad error handing in 3/5
	   *) Changed "init" bitfield in 5/5 to a bool
	   *) Rebased to kvm.git/master:1f9050fd)

	v8:
	   *) Rebased to kvm.git/master:beeaacd1)
	   *) Dropped Davide's patch (2/5 in v7) since it's now upstream
	   *) Folded v7's 1/5 and 3/5 together, and added a single
	      eventfd hunk to convert wake_up_locked_polled to wake_up_polled
	   *) Dropped irqfd->active bit in favor of irqfd_is_active() function
	   *) Cleaned up comments in 1/3
	   *) Dropped v7's 5/5 (slow-work)
	   *) Added new patch (3/3) which makes the cleanup-wq's creation
	      dynamic so to avoid the resource penalty for guests that do
	      not use irqfd.

	v7:
	   *) Addressed minor-nit feedback from Michael
	   *) Cleaned up patch headers
	   *) Re-added separate slow-work feature patch to end for comparison

	v6:
	   *) Removed slow-work in favor of using a dedicated single-thread
              workqueue.
	   *) Condensed cleanup path to always use deferred shutdown
	   *) Saved about 56 lines over v5, with the following diffstat:

 	   include/linux/kvm_host.h |    2 
 	   virt/kvm/eventfd.c       |  248 ++++++++++++++++++-----------------------------
 	   2 files changed, 97 insertions(+), 153 deletions(-)
	v5:
           Untracked..
]


---

Gregory Haskins (5):
      KVM: create irqfd-cleanup-wq on demand
      KVM: add irqfd DEASSIGN feature
      KVM: Fix races in irqfd using new eventfd_kref_get interface
      eventfd: use locked POLLHUP
      kvm: prepare irqfd for having interrupts disabled during eventfd->release


 fs/eventfd.c             |    7 -
 include/linux/kvm.h      |    2 
 include/linux/kvm_host.h |    6 +
 virt/kvm/eventfd.c       |  281 ++++++++++++++++++++++++++++++++++++----------
 4 files changed, 229 insertions(+), 67 deletions(-)

-- 
Signature
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/