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From: Christoph Hellwig <hch@infradead.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: David Howells <dhowells@redhat.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Christoph Lameter <cl@linux.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mm <linux-mm@kvack.org>
Subject: Re: Bulk kmalloc
Date: Fri, 10 May 2019 10:11:10 -0700	[thread overview]
Message-ID: <20190510171110.GA3449@infradead.org> (raw)
In-Reply-To: <20190510165001.GA3162@bombadil.infradead.org>

On Fri, May 10, 2019 at 09:50:01AM -0700, Matthew Wilcox wrote:
> kvmalloc() is the normal solution here.  Usual reasons for not being
> able to do that would be that you do DMA to the memory or that you need
> to be able to free each of these objects individually.

Note that you absolutely can do DMA to vmalloced buffers.  It just is
very painful due to the manual coherency management..


  reply	other threads:[~2019-05-10 17:11 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <14647.1557415738@warthog.procyon.org.uk>
2019-05-10 11:50 ` Bulk kmalloc Jesper Dangaard Brouer
2019-05-10 16:23 ` David Howells
2019-05-10 16:50   ` Matthew Wilcox
2019-05-10 17:11     ` Christoph Hellwig [this message]
2019-05-10 17:35       ` Matthew Wilcox
2019-05-13 12:04   ` David Howells

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