The branch stable/13 has been updated by markj:
URL:
https://cgit.FreeBSD.org/src/commit/?id=1eee54cbf040adba158e42150332905630253264
commit 1eee54cbf040adba158e42150332905630253264
Author: Mark Johnston <ma...@freebsd.org>
AuthorDate: 2021-02-22 15:03:37 +0000
Commit: Mark Johnston <ma...@freebsd.org>
CommitDate: 2021-03-01 00:32:18 +0000
m_uiotombuf_nomap(): Stop clearing PG_ZERO in newly allocated pages
The caller should not be passing M_ZERO in the first place, so PG_ZERO
will not be preserved by the page allocator and clearing it accomplishes
nothing.
Reviewed by: gallatin, jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28808
(cherry picked from commit 608c44f96e88f28f9607374a6c9327d13d3d3d0e)
---
sys/kern/uipc_mbuf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index f73bfab07eaf..5296aac0edc4 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -1656,6 +1656,7 @@ m_uiotombuf_nomap(struct uio *uio, int how, int len, int
maxseg, int flags)
VM_ALLOC_WIRED;
MPASS((flags & M_PKTHDR) == 0);
+ MPASS((how & M_ZERO) == 0);
/*
* len can be zero or an arbitrary large value bound by
@@ -1709,7 +1710,6 @@ retry_page:
goto retry_page;
}
}
- pg_array[i]->flags &= ~PG_ZERO;
mb->m_epg_pa[i] = VM_PAGE_TO_PHYS(pg_array[i]);
mb->m_epg_npgs++;
}
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