Dave Chinner writes:
> On Tue, Mar 24, 2015 at 09:26:58AM -0600, Jens Axboe wrote:
>> The top bits of bio->bi_flags are reserved for keeping the
>> allocation pool, set aside the next four bits for carrying
>> a stream ID. That leaves us with support for 15 streams,
>> 0 is reserved as a "stream
> -Original Message-
> From: Matias Bjørling [mailto:m...@bjorling.me]
> Sent: Wednesday, March 25, 2015 1:11 AM
> To: Ming Lin-SSI; Jens Axboe; linux-kernel@vger.kernel.org; linux-
> fsde...@vger.kernel.org
> Subject: Re: [PATCH 1/6] block: add support for carrying a
Pushing it higher is not a big deal as far as the implementation goes, though
16 bits might be stealing a bit too much space for this. On 32-bit archs, we
have 18 bits currently free that we can abuse. The Samsung device supports
16 streams. That's honestly a lot more than I would expect most devi
On Tue, Mar 24, 2015 at 09:26:58AM -0600, Jens Axboe wrote:
> The top bits of bio->bi_flags are reserved for keeping the
> allocation pool, set aside the next four bits for carrying
> a stream ID. That leaves us with support for 15 streams,
> 0 is reserved as a "stream not set" value.
>
> Add help
: add support for carrying a stream ID in a bio
On 03/24/2015 11:11 AM, Matias Bjørling wrote:
On 03/24/2015 04:26 PM, Jens Axboe wrote:
The top bits of bio->bi_flags are reserved for keeping the allocation
pool, set aside the next four bits for carrying a stream ID. That
leaves us with support
> -Original Message-
> From: Jens Axboe [mailto:ax...@kernel.dk]
> Sent: Tuesday, March 24, 2015 10:27 AM
> To: Matias Bjørling; Jens Axboe; linux-kernel@vger.kernel.org; linux-
> fsde...@vger.kernel.org
> Cc: Ming Lin-SSI
> Subject: Re: [PATCH 1/6] block: add support
On 03/24/2015 11:11 AM, Matias Bjørling wrote:
On 03/24/2015 04:26 PM, Jens Axboe wrote:
The top bits of bio->bi_flags are reserved for keeping the
allocation pool, set aside the next four bits for carrying
a stream ID. That leaves us with support for 15 streams,
0 is reserved as a "stream not s
On 03/24/2015 04:26 PM, Jens Axboe wrote:
The top bits of bio->bi_flags are reserved for keeping the
allocation pool, set aside the next four bits for carrying
a stream ID. That leaves us with support for 15 streams,
0 is reserved as a "stream not set" value.
15 streams seem very limited. Can t
The top bits of bio->bi_flags are reserved for keeping the
allocation pool, set aside the next four bits for carrying
a stream ID. That leaves us with support for 15 streams,
0 is reserved as a "stream not set" value.
Add helpers for setting/getting stream ID of a bio.
Signed-off-by: Jens Axboe
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