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Date: Thu, 24 Oct 2013 22:23:22 -0400 From: Mark Lord <kernel@...rt.ca> To: Alexander Gordeev <agordeev@...hat.com>, Tejun Heo <tj@...nel.org> CC: linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>, Michael Ellerman <michael@...erman.id.au>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Ben Hutchings <bhutchings@...arflare.com>, David Laight <David.Laight@...LAB.COM>, "H. Peter Anvin" <hpa@...or.com>, linux-pci@...r.kernel.org Subject: Re: [PATCH RFC v2 12/29] PCI/MSI: Introduce pcim_enable_msi*() family helpers On 13-10-24 10:31 AM, Alexander Gordeev wrote: > On Thu, Oct 24, 2013 at 11:51:58AM +0100, Tejun Heo wrote: >> I haven't looked into any details but, if the above works for most use >> cases, it looks really good to me. > > Well, if we reuse Michael's statistics: > > - 58 drivers call pci_enable_msix() > - 24 try a single allocation and then fallback to MSI/LSI > - 19 use the loop style allocation > - 14 try an allocation, and if it fails retry once > > ...then I expect most of 19/58 (loop style) could be converted to > pcim_enable_msix() and pcim_enable_msix_range() and all of 14/58 > (single fallback) should be converted to pcim_enable_msix() users. Those are just the in-kernel drivers. There are many, many more out-of-kernel drivers for embedded platforms, hardware in-development, etc.. Let's not be overly presumptive about the size of the user base. Cheers -- 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/
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