From: Dan Carpenter <dan.carpenter@oracle.com>
To: Ajay Kaher <akaher@vmware.com>
Cc: kys@microsoft.com, haiyangz@microsoft.com,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
Bjorn Helgaas <bhelgaas@google.com>,
devel@linuxdriverproject.org
Subject: Re: [PATCH 1/3] PCI: hv: Allocate physically contiguous hypercall params buffer
Date: Mon, 21 Jan 2019 16:19:42 +0300 [thread overview]
Message-ID: <20190121131942.GH4482@kadam> (raw)
In-Reply-To: <1547758038-5255-2-git-send-email-akaher@vmware.com>
On Fri, Jan 18, 2019 at 02:17:16AM +0530, Ajay Kaher wrote:
> hv_do_hypercall() assumes that we pass a segment from a physically
> contiguous buffer. A buffer allocated on the stack may not work if
> CONFIG_VMAP_STACK=y is set.
>
> Use kmalloc() to allocate this buffer.
>
Since you're going to need to resend this anyway, can you add in the
commit message what this looks like from a user perspective? Presumably
it's an occasional crash?
regards,
dan carpenter
next prev parent reply other threads:[~2019-01-21 13:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-17 20:47 [PATCH 0/3] PCI: hv: Use vPCI protocol version 1.2 for v4.9 Ajay Kaher
2019-01-17 13:21 ` Greg KH
2019-01-17 20:47 ` [PATCH 1/3] PCI: hv: Allocate physically contiguous hypercall params buffer Ajay Kaher
2019-01-17 14:57 ` Bjorn Helgaas
2019-01-21 13:19 ` Dan Carpenter [this message]
2019-01-21 13:36 ` Dan Carpenter
2019-01-17 20:47 ` [PATCH 2/3] PCI: hv: Add vPCI version protocol negotiation Ajay Kaher
2019-01-17 14:59 ` Bjorn Helgaas
2019-01-17 20:47 ` [PATCH 3/3] PCI: hv: Use vPCI protocol version 1.2 for v4.9 Ajay Kaher
2019-01-17 15:06 ` Bjorn Helgaas
2019-01-18 14:05 ` Ajay Kaher
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