On Wed, 2015-10-28 at 22:33 +0000, Al Viro wrote: > On Wed, Oct 28, 2015 at 02:44:28PM -0700, Eric Dumazet wrote: > > > Well, all this complexity goes away with a O_FD_FASTALLOC / > > SOCK_FD_FASTALLOC bit in various fd allocations, which specifically > > tells the kernel we do not care getting the lowest possible fd as POSIX > > mandates. > > ... which won't do a damn thing for existing userland. For the userland that need +5,000,000 socket, I can tell you they are using this flag as soon they are aware it exists ;) > > > Except for legacy stuff and stdin/stdout/stderr games, I really doubt > > lot of applications absolutely rely on the POSIX thing... > > We obviously can't turn that into default behaviour, though. BTW, what > distribution do you have in mind for those random descriptors? Uniform > on [0,INT_MAX] is a bad idea for obvious reasons - you'll blow the > memory footprint pretty soon... Simply [0 , fdt->max_fds] is working well in most cases. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
