CTASSERT that MSZIE is a power of 2 (otherwise dtom() breaks)
Ask uma_zcreate() to align mbufs to MSIZE bytes (otherwise dtom() breaks) As it happens, uma_zalloc_arg() always returned mbufs aligned to MSIZE anyway, but that was an implementation side-effect.... KASSERT -> CTASSERT suggested by: dd@ Approved by: silence on -net
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=135510
@ -123,6 +123,9 @@ static void mb_fini_pack(void *, int);
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static void mb_reclaim(void *);
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static void mbuf_init(void *);
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/* Ensure that MSIZE doesn't break dtom() - it must be a power of 2 */
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CTASSERT((((MSIZE - 1) ^ MSIZE) + 1) >> 1 == MSIZE);
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/*
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* Initialize FreeBSD Network buffer allocation.
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*/
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@ -135,7 +138,7 @@ mbuf_init(void *dummy)
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* Configure UMA zones for Mbufs, Clusters, and Packets.
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*/
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zone_mbuf = uma_zcreate("Mbuf", MSIZE, mb_ctor_mbuf, mb_dtor_mbuf,
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NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_MAXBUCKET);
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NULL, NULL, MSIZE - 1, UMA_ZONE_MAXBUCKET);
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zone_clust = uma_zcreate("MbufClust", MCLBYTES, mb_ctor_clust,
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mb_dtor_clust, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_REFCNT);
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if (nmbclusters > 0)
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