Jiang, Yunhong
2008-Dec-19 09:59 UTC
[Xen-devel] [PATCH] Change the pcidevs_lock from rw_lock to spin_lock
This patch change the pcidevs_lock to spin_lock. As pcidevs_lock is changed from protecting only the alldevs_list to more than that, it doesn''t benifit too much from the rw_lock. Also the previous patch 18906:2941b1a97c60 is wrong to use read_lock to protect some sensitive data (thanks Espen pointed out that). Also two minor fix in this patch: a) deassign_device will deadlock when try to get the pcidevs_lock if called by pci_release_devices, remove the lock to the caller. b) The iommu_domain_teardown should not ASSERT for the pcidevs_lock because it just update the domain''s vt-d mapping. Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com> Thanks Yunhong Jiang _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel