hselasky 107bf62085 Avoid use of contiguous memory allocations in busdma when possible. ... This patch improves the boundary checks in busdma to allow more cases using the regular page based kernel memory allocator. Especially in the case of having a non-zero boundary in the parent DMA tag. For example AMD64 based platforms set the PCI DMA tag boundary to PCI_DMA_BOUNDARY, 4GB, which before this patch caused contiguous memory allocations to be preferred when allocating more than PAGE_SIZE bytes. Even if the required alignment was less than PAGE_SIZE bytes. This patch also fixes the nsegments check for using kmem_alloc_attr() when the maximum segment size is less than PAGE_SIZE bytes. Updated some comments describing the code in question. Differential Revision: https://reviews.freebsd.org/D10645 Reviewed by: kib, jhb, gallatin, scottl MFC after: 1 week Sponsored by: Mellanox Technologies		2017-05-16 14:21:37 +00:00
..
acpica	Ensure that resume path on amd64 only accesses page tables for normal	2017-05-15 20:52:43 +00:00
bios
cpufreq	- Mention mismatching numbers in MSR vs. ACPI _PSS count warning: seeing	2016-12-01 14:31:05 +00:00
include	Remove the LSOL26CALLS_SEL constant.	2017-04-25 23:19:27 +00:00
iommu	Correct calculation of the entry->free_down in the invariants-checking	2017-04-14 15:16:41 +00:00
isa	Validate values read from the RTC before trying BCD decoding	2017-03-09 02:19:30 +00:00
pci	Convert PCIe Hot Plug to using pci_request_feature	2017-02-25 06:11:59 +00:00
x86	Avoid use of contiguous memory allocations in busdma when possible.	2017-05-16 14:21:37 +00:00
xen	All these files need sys/vmmeter.h, but now they got it implicitly	2017-04-17 17:07:00 +00:00