Re: [PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread SeongJae Park
On Tue, 22 Sep 2020 13:35:30 +0200 "Jürgen Groß" wrote: > On 22.09.20 13:26, SeongJae Park wrote: > > On Tue, 22 Sep 2020 13:12:59 +0200 "Roger Pau Monné" > > wrote: > > > >> On Tue, Sep 22, 2020 at 12:52:07PM +0200, SeongJae Park wrote: > >>> From: SeongJae Park > >>> > >>> Persistent

Re: [PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread SeongJae Park
On Tue, 22 Sep 2020 13:35:11 +0200 "Roger Pau Monné" wrote: > On Tue, Sep 22, 2020 at 01:26:38PM +0200, SeongJae Park wrote: > > On Tue, 22 Sep 2020 13:12:59 +0200 "Roger Pau Monné" > > wrote: > > > > > On Tue, Sep 22, 2020 at 12:52:07PM +0200, SeongJae Park wrote: > > > > From: SeongJae

Re: [PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread Roger Pau Monné
On Tue, Sep 22, 2020 at 01:26:38PM +0200, SeongJae Park wrote: > On Tue, 22 Sep 2020 13:12:59 +0200 "Roger Pau Monné" > wrote: > > > On Tue, Sep 22, 2020 at 12:52:07PM +0200, SeongJae Park wrote: > > > From: SeongJae Park > > > > > > Persistent grants feature provides high scalability. On

Re: [PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread Jürgen Groß
On 22.09.20 13:26, SeongJae Park wrote: On Tue, 22 Sep 2020 13:12:59 +0200 "Roger Pau Monné" wrote: On Tue, Sep 22, 2020 at 12:52:07PM +0200, SeongJae Park wrote: From: SeongJae Park Persistent grants feature provides high scalability. On some small systems, however, it could incur data

Re: [PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread SeongJae Park
On Tue, 22 Sep 2020 13:12:59 +0200 "Roger Pau Monné" wrote: > On Tue, Sep 22, 2020 at 12:52:07PM +0200, SeongJae Park wrote: > > From: SeongJae Park > > > > Persistent grants feature provides high scalability. On some small > > systems, however, it could incur data copy overheads[1] and thus

Re: [PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread Roger Pau Monné
On Tue, Sep 22, 2020 at 12:52:07PM +0200, SeongJae Park wrote: > From: SeongJae Park > > Persistent grants feature provides high scalability. On some small > systems, however, it could incur data copy overheads[1] and thus it is > required to be disabled. But, there is no option to disable it.

[PATCH v2 1/3] xen-blkback: add a parameter for disabling of persistent grants

2020-09-22 Thread SeongJae Park
From: SeongJae Park Persistent grants feature provides high scalability. On some small systems, however, it could incur data copy overheads[1] and thus it is required to be disabled. But, there is no option to disable it. For the reason, this commit adds a module parameter for disabling of