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fix 2 problems with subregion allocation:

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-a subregion start was ignored if all previous allocations were before
the subregion, reported by Lennart Augustsson in PR kern/7539
-an existing allocation which overlaps the beginning of the subregion
was ignored (ie overlapped) if is is not the last allocation
This commit is contained in:
drochner 1999-05-11 11:02:54 +00:00
parent d480a15932
commit 4a60ccd128
1 changed files with 5 additions and 5 deletions
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10
sys/kern/subr_extent.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_extent.c,v 1.24 1999/02/18 18:52:29 mycroft Exp $ */
/* $NetBSD: subr_extent.c,v 1.25 1999/05/11 11:02:54 drochner Exp $ */
/*-
* Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
@ -604,11 +604,11 @@ extent_alloc_subregion1(ex, substart, subend, size, alignment, skew, boundary,
}
/*
* If there are no allocated regions beyond where we want to be,
* relocate the start of our candidate region to the end of
* the last allocated region (if there was one).
* Relocate the start of our candidate region to the end of
* the last allocated region (if there was one overlapping
* our subrange).
*/
if (rp == NULL && last != NULL)
if (last != NULL && last->er_end >= newstart)
newstart = EXTENT_ALIGN((last->er_end + 1), alignment, skew);
for (; rp != NULL; rp = rp->er_link.le_next) {