On 03/29/2015 11:02 AM, Boaz Harrosh wrote:
> On 03/26/2015 09:32 PM, Dave Chinner wrote:
<>
> I think that ->direct_access should not be any different then
> any other block-device access, ie allow to sleep.
>
BTW: Matthew you yourself have said that after a page-load of memcpy
a user should
On 03/26/2015 09:32 PM, Dave Chinner wrote:
<>
>> I'm leaning towards the latter. But I'm not sure what GFP flags to
>> recommend that brd use ... GFP_NOWAIT | __GFP_ZERO, perhaps?
>
> What, so we get random IO failures under memory pressure?
>
> I really think we should allow .direct_access to
On 03/29/2015 11:02 AM, Boaz Harrosh wrote:
On 03/26/2015 09:32 PM, Dave Chinner wrote:
I think that -direct_access should not be any different then
any other block-device access, ie allow to sleep.
BTW: Matthew you yourself have said that after a page-load of memcpy
a user should call
On 03/26/2015 09:32 PM, Dave Chinner wrote:
I'm leaning towards the latter. But I'm not sure what GFP flags to
recommend that brd use ... GFP_NOWAIT | __GFP_ZERO, perhaps?
What, so we get random IO failures under memory pressure?
I really think we should allow .direct_access to sleep. It
On Thu, Mar 26, 2015 at 01:09:18PM -0400, Matthew Wilcox wrote:
> On Tue, Mar 24, 2015 at 11:50:47AM -0700, Matt Mullins wrote:
> > We're also developing a user of direct_access, and we ended up with some
> > questions about the sleeping guarantees of the direct_access API.
>
> That's a great
On Tue, Mar 24, 2015 at 11:50:47AM -0700, Matt Mullins wrote:
> We're also developing a user of direct_access, and we ended up with some
> questions about the sleeping guarantees of the direct_access API.
That's a great question. Since DAX can always sleep when it's calling
into
On Tue, Mar 24, 2015 at 11:50:47AM -0700, Matt Mullins wrote:
We're also developing a user of direct_access, and we ended up with some
questions about the sleeping guarantees of the direct_access API.
That's a great question. Since DAX can always sleep when it's calling
into
On Thu, Mar 26, 2015 at 01:09:18PM -0400, Matthew Wilcox wrote:
On Tue, Mar 24, 2015 at 11:50:47AM -0700, Matt Mullins wrote:
We're also developing a user of direct_access, and we ended up with some
questions about the sleeping guarantees of the direct_access API.
That's a great question.
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