From: "Kani, Toshimitsu" <toshi.kani@hpe.com>
To: "dan.j.williams@intel.com" <dan.j.williams@intel.com>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>
Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"hch@lst.de" <hch@lst.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3] libnvdimm, pmem: use REQ_FUA, REQ_FLUSH for nvdimm_flush()
Date: Wed, 13 Jul 2016 19:46:56 +0000 [thread overview]
Message-ID: <1468439194.8908.55.camel@hpe.com> (raw)
In-Reply-To: <146836238217.14676.14154640837011539657.stgit@dwillia2-desk3.amr.corp.intel.com>
On Tue, 2016-07-12 at 15:26 -0700, Dan Williams wrote:
> Given that nvdimm_flush() has higher overhead than wmb_pmem() (pointer
> chasing through nd_region), and that we otherwise assume a platform has
> ADR capability when flush hints are not present, move nvdimm_flush() to
> REQ_FLUSH context.
>
> Note that we still arrange for nvdimm_flush() to be called even in the
> ADR case. We need at least once wmb() fence to push buffered writes in
> the cpu out to the ADR protected domain.
>
> Cc: Toshi Kani <toshi.kani@hpe.com>
> Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This looks good to me.
Reviewed-by: Toshi Kani <toshi.kani@hpe.com>
Thanks,
-Toshi
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next prev parent reply other threads:[~2016-07-13 19:47 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-10 3:24 [PATCH v2 00/17] replace pcommit with ADR or directed flushing Dan Williams
2016-07-10 3:24 ` [PATCH v2 01/17] nfit: always associate flush hints Dan Williams
2016-07-10 3:24 ` [PATCH v2 02/17] nfit: don't override return value of nfit_mem_init Dan Williams
2016-07-10 3:24 ` [PATCH v2 03/17] libnvdimm: introduce devm_nvdimm_memremap(), convert nfit_spa_map() users Dan Williams
2016-07-10 5:30 ` kbuild test robot
2016-07-12 22:22 ` [PATCH v3] " Dan Williams
2016-07-10 3:24 ` [PATCH v2 04/17] libnvdimm, nfit: remove nfit_spa_map() infrastructure Dan Williams
2016-07-10 3:24 ` [PATCH v2 05/17] libnvdimm, nfit: move flush hint mapping to region-device driver-data Dan Williams
2016-07-10 3:25 ` [PATCH v2 06/17] tools/testing/nvdimm: simulate multiple flush hints per-dimm Dan Williams
2016-07-10 3:25 ` [PATCH v2 07/17] libnvdimm: keep region data alive over namespace removal Dan Williams
2016-07-10 3:25 ` [PATCH v2 08/17] libnvdimm: introduce nvdimm_flush() and nvdimm_has_flush() Dan Williams
2016-07-10 4:47 ` kbuild test robot
2016-07-10 5:01 ` Dan Williams
2016-07-11 3:48 ` Li, Philip
2016-07-12 22:25 ` [PATCH v3] " Dan Williams
2016-07-10 3:25 ` [PATCH v2 09/17] libnvdimm: cycle flush hints Dan Williams
2016-07-10 3:25 ` [PATCH v2 10/17] libnvdimm, pmem: use REQ_FUA, REQ_FLUSH for nvdimm_flush() Dan Williams
2016-07-12 22:26 ` [PATCH v3] " Dan Williams
2016-07-13 19:46 ` Kani, Toshimitsu [this message]
2016-07-10 3:25 ` [PATCH v2 11/17] libnvdimm, pmem: flush posted-write queues on shutdown Dan Williams
2016-07-10 3:25 ` [PATCH v2 12/17] fs/dax: remove wmb_pmem() Dan Williams
2016-07-10 3:25 ` [PATCH v2 13/17] libnvdimm, pmem: use nvdimm_flush() for namespace I/O writes Dan Williams
2016-07-10 3:25 ` [PATCH v2 14/17] pmem: kill wmb_pmem() Dan Williams
2016-07-10 3:25 ` [PATCH v2 15/17] Revert "KVM: x86: add pcommit support" Dan Williams
2016-07-10 3:25 ` [PATCH v2 16/17] x86/insn: remove pcommit Dan Williams
[not found] ` <146812115425.32932.3314855641604340233.stgit-p8uTFz9XbKj2zm6wflaqv1nYeNYlB/vhral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-07-12 14:57 ` Peter Zijlstra
[not found] ` <20160712145757.GV30909-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2016-07-12 22:12 ` Dan Williams
2016-07-22 15:55 ` Dan Williams
[not found] ` <CAPcyv4gE8owJZOokGJmxH97CZwkD9uBZys=2-VCBgZy8aLkT8w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-07-22 16:52 ` Ingo Molnar
2016-07-23 0:54 ` Dan Williams
[not found] ` <CAPcyv4iQn_rR5wEb0PUOVL2tsWT_-H08kgPDsKmq1LRqGkxdZQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-07-23 7:49 ` Ingo Molnar
2016-07-10 3:25 ` [PATCH v2 17/17] pmem: kill __pmem address space Dan Williams
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