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zfs dmu_read: loosen the assertion.

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Since switch to the lockless grab, shared busy for ahead/behind pages
allows other threads to validate and map the pages readonly.

Reviewed by:	avg, jeff, markj
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D23986
This commit is contained in:
Konstantin Belousov 2020-03-06 21:15:25 +00:00
parent 3eac6de2f0
commit d5b7401f64
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=358719
1 changed files with 2 additions and 2 deletions
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4
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c
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@ -1752,7 +1752,7 @@ dmu_read_pages(objset_t *os, uint64_t object, vm_page_t *ma, int count,
break;
}
ASSERT(m->dirty == 0);
ASSERT(!pmap_page_is_mapped(m));
ASSERT(!pmap_page_is_write_mapped(m));
ASSERT(db->db_size > PAGE_SIZE);
bufoff = IDX_TO_OFF(m->pindex) % db->db_size;
@ -1867,7 +1867,7 @@ dmu_read_pages(objset_t *os, uint64_t object, vm_page_t *ma, int count,
break;
}
ASSERT(m->dirty == 0);
ASSERT(!pmap_page_is_mapped(m));
ASSERT(!pmap_page_is_write_mapped(m));
ASSERT(db->db_size > PAGE_SIZE);
bufoff = IDX_TO_OFF(m->pindex) % db->db_size;