On Fri, 2011-04-01 at 00:18 +0200, Michal Nazarewicz wrote: > On Thu, 31 Mar 2011 23:14:38 +0200, Dave Hansen wrote: > > We BUG_ON() in bootmem. Basically if we try to allocate an early-boot > > structure and fail, we're screwed. We can't keep running without an > > inode hash, or a mem_map[]. > > > > This looks like it's going to at least get partially used in drivers, at > > least from the examples. Are these kinds of things that, if the driver > > fails to load, that the system is useless and hosed? Or, is it > > something where we might limp along to figure out what went wrong before > > we reboot? > > Bug in the above place does not mean that we could not allocate memory. It > means caller is broken. Could you explain that a bit? Is this a case where a device is mapped to a very *specific* range of physical memory and no where else? What are the reasons for not marking it off limits at boot? I also saw some bits of isolation and migration in those patches. Can't the migration fail? -- Dave -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>