Date: Wed, 11 Nov 1998 01:01:34 -0800 From: David Greenman <dg@root.com> To: Terry Lambert <tlambert@primenet.com> Cc: grog@lemis.com, Reinier.Bezuidenhout@KryptoKom.DE, freebsd-hackers@FreeBSD.ORG Subject: Re: Malloc in the kernel Message-ID: <199811110901.BAA13927@root.com> In-Reply-To: Your message of "Wed, 11 Nov 1998 07:21:56 GMT." <199811110721.AAA04416@usr01.primenet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
>> >> > In general, the kernel is better at deciding what memory it needs >> >> > when it needs it than a kernel code author. You either trust >> >> > the locality of reference model upon which VM systems are based, >> >> > or you don't. >> >> >> >> Assuming that fits his needs, what's the answer? >> > >> >vm_pager_allocate(OBJT_SWAP, 0, OFF_TO_IDX(size), VM_PROT_DEFAULT, 0); >> >> Bzzt! Wrong! >> >> ...but you could use kmem_alloc_pageable() (or call vm_map_find() directly) >> to allocate demand-zero, pageable, kernel memory. > >Hmmm.... > > >Better fix /sys/kern/sysv_shm.c then, since that's where I cribbed the >code from... sysv_shm.c is a special beast that specifically *avoids* allocating kernel VM for the objects it manages. -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199811110901.BAA13927>