From owner-freebsd-hackers  Tue Dec 22 16:19:48 1998
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Date: Tue, 22 Dec 1998 16:19:43 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <199812230019.QAA08154@apollo.backplane.com>
To: hackers@FreeBSD.ORG
Subject: M_KERNEL in sys/malloc.h ???
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    Does anyone know what M_KERNEL is sys/malloc.h is supposed to do?  It
    is used in precisely two places in the code as far as I can tell:

    vm/default_pager.c:     if (swap_pager_swp_alloc(object, M_KERNEL) != 0) {
    vm/default_pager.c:     if (swap_pager_swp_alloc(object, M_KERNEL) != 0) {
    vm/swap_pager.c:                spc->spc_bp = malloc(sizeof(*bp), M_TEMP, M_KERNEL);

    But kern/kern_malloc.c doesn't appear to really use it.  On the otherhand
    I do see lots of absolute comparison of the malloc 'flags' to M_WAITOK
    (0) or M_NOWAIT which the use of M_KERNEL would interfere with.  I can't
    tell if the side effects are something that are expected, or if the
    side effects are a bug.

    Anybody know?

						-Matt


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