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Groups > linux.kernel > #1180345
| From | Dan Williams <dan.j.williams@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers |
| Date | 2015-07-09 02:50 +0200 |
| Message-ID | <pK8ch-1HX-9@gated-at.bofh.it> (permalink) |
| References | <pIO5X-W8-11@gated-at.bofh.it> <pJo9s-6oK-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Jul 6, 2015 at 4:38 PM, Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote: > On Sat, Jul 04, 2015 at 07:09:19AM -0700, Dan Williams wrote: >> The problem I ran into was needing to remove devices that still had >> yet to be probed and not being able to use registration completion vs >> the device_lock() to effectively synchronize the sub-system. > > Why do you need to "synchronize the sub-system"? The asynchronous > probing should be transparent to the driver. Just unregister the device > (or the driver) and driver core will ensure that probe() is not in > flight. Async registration is indeed transparent to the driver. The primary need to "flush registration" is the case of "region" devices that reference a set of NVDIMM devices. A region device requires all related NVDIMMs to be active before the region can be enabled. I'll look into a more concrete example of the tradeoffs between asynchronous probing vs registration. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dan Williams <dan.j.williams@intel.com> - 2015-07-05 11:10 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dan Williams <dan.j.williams@intel.com> - 2015-07-09 02:40 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-07-09 02:50 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dan Williams <dan.j.williams@intel.com> - 2015-07-09 03:10 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dan Williams <dan.j.williams@intel.com> - 2015-07-09 02:50 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dan Williams <dan.j.williams@intel.com> - 2015-07-09 03:00 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-07-09 03:00 +0200
Re: [PATCH 2/8] driver-core: add asynchronous probing support for drivers Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-07-09 03:00 +0200
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