Date: Sat, 20 May 2000 15:05:19 -0600 From: Warner Losh <imp@village.org> To: Sergey Babkin <babkin@bellatlantic.net> Cc: Alexander Langer <alex@big.endian.de>, hackers@FreeBSD.ORG Subject: Re: further question to bus_alloc_resource Message-ID: <200005202105.PAA54031@billy-club.village.org> In-Reply-To: Your message of "Sat, 20 May 2000 16:08:47 EDT." <3926F0CF.DA23E3AD@bellatlantic.net> References: <3926F0CF.DA23E3AD@bellatlantic.net> <20000520013751.A5852@cichlids.cichlids.com> <20000520014352.B5947@cichlids.cichlids.com> <3925E63E.EF415CFF@bellatlantic.net> <20000520114607.A1832@cichlids.cichlids.com>
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In message <3926F0CF.DA23E3AD@bellatlantic.net> Sergey Babkin writes: : Well, I suppose unloading drivers makes much sense only in case : if hardware supports hot-plug. And when one is developing the driver, it helps a whole lot to add unload capability. kldunload takes 1 second. reboot takes 120. : I see the argument of upgrading the : driver version without reboot as purely theoretical. For driver : debugging the need to chnage the driver commonly happens after : the old version somehow wedges the system. And upgrading drivers : on a running production system is not something I personally would : do. This is a dangerous operation and if it would cause any problems : they would better happen at pre-scheduled boot time, not on a running : machines with users. That's why loading drivers at higher security levels is prohibited. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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