On Sun, Feb 14, 2010 at 02:51:17PM +0100, Rafael J. Wysocki wrote: > On Saturday 13 February 2010, Gary Hade wrote: > > On Sat, Feb 13, 2010 at 01:20:29AM +0100, Rafael J. Wysocki wrote: > > > On Friday 12 February 2010, Rafael J. Wysocki wrote: > > > > On Friday 12 February 2010, Gary Hade wrote: > ... > > > In fact there are two problems in there. First, the bridge event notification > > > calls handle_bridge_insertion() which attempts to install a PM notifier for > > > the bridge and that deadlocks, because it tries to acquire the mutex > > > recursively. Second, apparently, init_bridge_misc() may be called in the > > > notification code path and it attempts to unregister the notifier and register > > > it again, which can't be done with pci_acpi_notify_mtx held. > > > > > > I guess there are similar problems on the hot remove notification path. > > > > > > Anyway, I have a new version of the patch and I'm going to test it a bit > > > over the weekend. Unfortunately, I don't have hardware with PCI hotplug > > > capability, so I'll send you the new patch for testing on Monday, if you don't > > > mind. > > > > I don't mind. > > Thanks! > > > Although I am concerned that my acpiphp only > > testing on our IBM System x boxes may not be sufficient to > > assure that PCI hotplug will work well on other PCI hotplug > > capable systems. I hope that others will also do some early > > testing of this code. > > The code that you've been testing is not very hardware-dependent. It only > matters whether or not the hardware is capable of PCI hotplugging > (ACPI-based), so your testing should be sufficient. Perhaps the tester-dependent aspect should also be considered. :) > > In fact I have two patches to test. The first one is an ACPI CA patch that > allows us to use more than one system notify handler per device (below). > Please test it on top of [1-3/9] with the replacement for [4-6/9] I sent > you earlier (http://patchwork.kernel.org/patch/78814/) and (updated) [7/9]. This seemed to work OK. I did not see any of the previously reported issues during hot-remove and hot-add. > > If this works, please apply the patch from > http://git.kernel.org/?p=linux/kernel/git/rafael/suspend-2.6.git;a=patch;h=d42c8b334bafe3a15f2dd43e395dafefe58dc588 > on top of the appended one and see if things still work correctly. Results still looked good after adding this patch. Gary -- Gary Hade System x Enablement IBM Linux Technology Center 503-578-4503 IBM T/L: 775-4503 garyhade@xxxxxxxxxx http://www.ibm.com/linux/ltc -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
