On Tue, Jan 24, 2017 at 12:13:41PM +0000, Alexander Motin wrote: > Author: mav > Date: Tue Jan 24 12:13:41 2017 > New Revision: 312694 > URL: https://svnweb.freebsd.org/changeset/base/312694 > > Log: > Make CTL ramdisk backend a real RAM disk. > > If "capacity" LU option is set, ramdisk backend now implements featured > thin provisioned disk, storing data in malloc(9) allocated memory blocks > of pblocksize bytes (default PAGE_SIZE or 4KB). Additionally ~0.2% of LU > size is used for indirection tree (bigger pblocksize reduce the overhead). > Backend supports all unmap and anchor operations. If configured capacity > is overflowed, proper error conditions are reported. > > If "capacity" LU option is not set, the backend operates mostly the same > as before without allocating real storage: writes go to nowhere, reads > return zeroes, reporting that all LBAs are unmapped. > > This backend is still mostly oriented on testing and benchmarking (it is > still a volatile RAM disk), but now it should allow to run real FS tests, > not only simple dumb dd.
This sounds too much like malloc-backed md(4). _______________________________________________ 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"
