From: Christoph Hellwig <hch@infradead.org>
To: Oliver Neukum <oneukum@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Jaewon Kim <jaewon31.kim@gmail.com>,
linux-mm@kvack.org, gregkh@linuxfoundation.org,
Jaewon Kim <jaewon31.kim@samsung.com>,
m.szyprowski@samsung.com, ytk.lee@samsung.com,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [RFC PATCH] usb: host: xhci: allow __GFP_FS in dma allocation
Date: Mon, 20 May 2019 03:12:06 -0700 [thread overview]
Message-ID: <20190520101206.GA9291@infradead.org> (raw)
In-Reply-To: <1558343365.12672.2.camel@suse.com>
On Mon, May 20, 2019 at 11:09:25AM +0200, Oliver Neukum wrote:
> we actually do. It is just higher up in the calling path:
Perfect!
> So, do we need to audit the mem_flags again?
> What are we supposed to use? GFP_KERNEL?
GFP_KERNEL if you can block, GFP_ATOMIC if you can't for a good reason,
that is the allocation is from irq context or under a spinlock. If you
think you have a case where you think you don't want to block, but it
is not because of the above reasons we need to have a chat about the
details.
next prev parent reply other threads:[~2019-05-20 10:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 16:02 [RFC PATCH] usb: host: xhci: allow __GFP_FS in dma allocation Jaewon Kim
2019-05-17 16:34 ` Matthew Wilcox
2019-05-18 1:53 ` Jaewon Kim
2019-05-20 5:56 ` Christoph Hellwig
2019-05-20 9:09 ` Oliver Neukum
2019-05-20 10:12 ` Christoph Hellwig [this message]
2019-05-20 14:16 ` Alan Stern
2019-05-20 14:23 ` Christoph Hellwig
2019-05-21 8:54 ` Oliver Neukum
2019-05-21 13:27 ` Christoph Hellwig
2019-05-21 13:11 ` Oliver Neukum
2019-05-21 14:00 ` Alan Stern
2019-05-22 6:31 ` Oliver Neukum
2019-05-22 14:56 ` Alan Stern
2019-05-22 20:47 ` Oliver Neukum
2019-05-23 14:01 ` Alan Stern
2019-05-28 12:34 ` Oliver Neukum
2019-05-28 14:25 ` Alan Stern
2019-05-23 12:32 ` Oliver Neukum
2019-05-23 16:35 ` Christoph Hellwig
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