From: Arnd Bergmann <arnd@arndb.de>
To: Christoph Hellwig <hch@infradead.org>
Cc: Hannes Reinecke <hare@suse.de>,
"(Exiting) Baolin Wang" <baolin.wang@linaro.org>,
Baolin Wang <baolin.wang7@gmail.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Asutosh Das <asutoshd@codeaurora.org>,
Orson Zhai <orsonzhai@gmail.com>,
Lyra Zhang <zhang.lyra@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
linux-mmc <linux-mmc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Hannes Reinecke <hare@suse.com>,
linux-block <linux-block@vger.kernel.org>,
Paolo Valente <paolo.valente@linaro.org>
Subject: Re: [PATCH v6 0/4] Add MMC software queue support
Date: Wed, 27 Nov 2019 13:01:06 +0100 [thread overview]
Message-ID: <CAK8P3a0gUWf_+ZmscuFanvPG=wN09ELL-JpByjJJM4Lo1FYmrQ@mail.gmail.com> (raw)
In-Reply-To: <20191127090023.GA23040@infradead.org>
On Wed, Nov 27, 2019 at 10:00 AM Christoph Hellwig <hch@infradead.org> wrote:
>
> On Tue, Nov 26, 2019 at 12:17:15PM +0100, Hannes Reinecke wrote:
> If requests are batched enough we could just drain
> and switch every time an other partition access comes in. Especially
> so if people only use partitions for boot partitions and other rarely
> used areas.
We only support a single user partition plus up to two boot partitions that
are accessed rarely, I don't think there is any reason to optimize switching
between them.
The only change that I think we need here is to change the partition switch
from something that is done synchronously during ->queue_rq() to
something that fits better into normal scheme of sending a cmd to
the device, returning BLK_STS_RESOURCE from ->queue_rq.
Possibly this could even be turned into a standard struct request that is
added between two normal requests for different partitions at some
point, if this simplifies the logic (I suspect it won't, but it may be worth
a try).
Arnd
next prev parent reply other threads:[~2019-11-27 12:01 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-11 7:33 [PATCH v6 0/4] Add MMC software queue support Baolin Wang
2019-11-11 7:33 ` [PATCH v6 1/4] mmc: Add MMC host " Baolin Wang
2019-11-11 7:33 ` [PATCH v6 2/4] mmc: host: sdhci: Add request_done ops for struct sdhci_ops Baolin Wang
2019-11-11 7:33 ` [PATCH v6 3/4] mmc: host: sdhci-sprd: Add software queue support Baolin Wang
2019-11-11 7:34 ` [PATCH v6 4/4] mmc: host: sdhci: Add a variable to defer to complete requests if needed Baolin Wang
2019-11-11 7:44 ` Adrian Hunter
2019-11-11 7:57 ` Baolin Wang
2019-11-11 9:28 ` [PATCH v6 0/4] Add MMC software queue support Arnd Bergmann
2019-11-11 12:58 ` Baolin Wang
2019-11-11 16:59 ` Arnd Bergmann
2019-11-12 8:48 ` Baolin Wang
2019-11-18 10:04 ` (Exiting) Baolin Wang
2019-11-22 9:50 ` Arnd Bergmann
2019-11-22 13:19 ` Linus Walleij
2019-11-22 13:49 ` Arnd Bergmann
2019-11-26 7:40 ` Paolo Valente
2019-11-26 9:54 ` Arnd Bergmann
2019-11-26 11:17 ` Hannes Reinecke
2019-11-27 7:49 ` Baolin Wang
2019-11-27 9:00 ` Christoph Hellwig
2019-11-27 12:01 ` Arnd Bergmann [this message]
2019-12-10 15:17 ` Ulf Hansson
2019-11-28 12:15 ` Martin K. Petersen
2019-11-28 15:54 ` Christoph Hellwig
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