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Subject: [Bug 194513] zfs recv hangs in state kmem arena
Date: Thu, 02 Mar 2017 00:09:38 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D194513

Dave Baukus <daveb@spectralogic.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daveb@spectralogic.com

--- Comment #21 from Dave Baukus <daveb@spectralogic.com> ---
(In reply to Steven Hartland from comment #10)

Is it possible that the referenced change does not have enough of a positive
effect with respect to zfs receive pending in kmem_arena because zfs receiv=
e is
attempting to allocate SPA_MAXBLOCKSIZE (16M) and the fragmentation check is
looking for fragmentation below zfs_max_recordsize (1M) ?

/*
 * Above limits know nothing about real level of KVA fragmentation.
 * Start aggressive reclamation if too little sequential KVA left.
 */
if (vmem_size(heap_arena, VMEM_MAXFREE) < zfs_max_recordsize)
       return (1);

--=20
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