On 11/21/19 4:50 PM, Keller, Jacob E wrote: > On Fri, 2019-11-22 at 02:34 +0200, Konstantin Belousov wrote: >> On Fri, Nov 22, 2019 at 12:25:00AM +0000, Keller, Jacob E wrote: >>> On Fri, 2019-11-22 at 02:22 +0200, Konstantin Belousov wrote: >>>> On Thu, Nov 21, 2019 at 09:52:54PM +0000, Keller, Jacob E wrote: >>>>> We use a bit string as a method of determining which index >>>>> numbers >>>>> have >>>>> been assigned. >>>> For unit numbers we have unr(9) as well. >>> >>> Does unr have support for allocating contiguous sequences of unit >>> numbers? >> >> No, it does not. Although the data structure is optimized to track >> contiguous runs, there is currently no API to allocate the chunk of >> desired >> length. > > Hmm. Might make more sense to extend the API to allow requesting chunks > of desired length, and then use that.
Well, there is also the rman structure which does handle runs. However, I think vmem is probably what you should use. cxgbe(4) uses it to manage sub-allocations of on-card memory for TLS keys and other buffers. You can write simple wrapper functions for your use case around vmem_* that the rest of your driver can use. I don't think it really makes sense to extend bitstring or unr. I think we should leave those for more specific use cases and use vmem for cases that need a more general solution. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
