From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Jan Kara <jack@suse.cz>, Matthew Wilcox <mawilcox@microsoft.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
linux-nvdimm@lists.01.org, dm-devel@redhat.com,
Ingo Molnar <mingo@redhat.com>,
viro@zeniv.linux.org.uk, "H. Peter Anvin" <hpa@zytor.com>,
linux-fsdevel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
hch@lst.de
Subject: Re: [PATCH v3 01/14] x86, uaccess: introduce copy_from_iter_flushcache for pmem / cache-bypass operations
Date: Sun, 18 Jun 2017 10:28:41 +0200 [thread overview]
Message-ID: <20170618082841.GA26456@lst.de> (raw)
In-Reply-To: <149703983098.20620.14791162611225792317.stgit@dwillia2-desk3.amr.corp.intel.com>
On Fri, Jun 09, 2017 at 01:23:51PM -0700, Dan Williams wrote:
> Implement a __copy_from_user_inatomic_flushcache, memcpy_page_flushcache, and
> memcpy_flushcache, that guarantee that the destination buffer is not dirty in
> the cpu cache on completion. The new copy_from_iter_flushcache and sub-routines
Wouldn't writethrough be a better name?
> will be used to replace the "pmem api" (include/linux/pmem.h +
> arch/x86/include/asm/pmem.h). The availability of copy_from_iter_flushcache()
> and memcpy_flushcache() are gated by the CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
> config symbol, and fallback to copy_from_iter_nocache() and plain memcpy()
> otherwise.
What is UACCESS about memcpy_flushcache?
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-nvdimm@lists.01.org, Jan Kara <jack@suse.cz>,
dm-devel@redhat.com, Toshi Kani <toshi.kani@hpe.com>,
Matthew Wilcox <mawilcox@microsoft.com>,
x86@kernel.org, linux-kernel@vger.kernel.org, hch@lst.de,
Jeff Moyer <jmoyer@redhat.com>, Ingo Molnar <mingo@redhat.com>,
viro@zeniv.linux.org.uk, "H. Peter Anvin" <hpa@zytor.com>,
linux-fsdevel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [PATCH v3 01/14] x86, uaccess: introduce copy_from_iter_flushcache for pmem / cache-bypass operations
Date: Sun, 18 Jun 2017 10:28:41 +0200 [thread overview]
Message-ID: <20170618082841.GA26456@lst.de> (raw)
In-Reply-To: <149703983098.20620.14791162611225792317.stgit@dwillia2-desk3.amr.corp.intel.com>
On Fri, Jun 09, 2017 at 01:23:51PM -0700, Dan Williams wrote:
> Implement a __copy_from_user_inatomic_flushcache, memcpy_page_flushcache, and
> memcpy_flushcache, that guarantee that the destination buffer is not dirty in
> the cpu cache on completion. The new copy_from_iter_flushcache and sub-routines
Wouldn't writethrough be a better name?
> will be used to replace the "pmem api" (include/linux/pmem.h +
> arch/x86/include/asm/pmem.h). The availability of copy_from_iter_flushcache()
> and memcpy_flushcache() are gated by the CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
> config symbol, and fallback to copy_from_iter_nocache() and plain memcpy()
> otherwise.
What is UACCESS about memcpy_flushcache?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Dan Williams <dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>,
Matthew Wilcox <mawilcox-0li6OtcxBFHby3iVrkZq2A@public.gmane.org>,
x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nvdimm-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org,
dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
hch-jcswGhMUV9g@public.gmane.org
Subject: Re: [PATCH v3 01/14] x86, uaccess: introduce copy_from_iter_flushcache for pmem / cache-bypass operations
Date: Sun, 18 Jun 2017 10:28:41 +0200 [thread overview]
Message-ID: <20170618082841.GA26456@lst.de> (raw)
In-Reply-To: <149703983098.20620.14791162611225792317.stgit-p8uTFz9XbKj2zm6wflaqv1nYeNYlB/vhral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
On Fri, Jun 09, 2017 at 01:23:51PM -0700, Dan Williams wrote:
> Implement a __copy_from_user_inatomic_flushcache, memcpy_page_flushcache, and
> memcpy_flushcache, that guarantee that the destination buffer is not dirty in
> the cpu cache on completion. The new copy_from_iter_flushcache and sub-routines
Wouldn't writethrough be a better name?
> will be used to replace the "pmem api" (include/linux/pmem.h +
> arch/x86/include/asm/pmem.h). The availability of copy_from_iter_flushcache()
> and memcpy_flushcache() are gated by the CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE
> config symbol, and fallback to copy_from_iter_nocache() and plain memcpy()
> otherwise.
What is UACCESS about memcpy_flushcache?
next prev parent reply other threads:[~2017-06-18 8:27 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 20:23 [PATCH v3 00/14] pmem: stop abusing __copy_user_nocache(), and other reworks Dan Williams
2017-06-09 20:23 ` Dan Williams
2017-06-09 20:23 ` Dan Williams
2017-06-09 20:23 ` [PATCH v3 01/14] x86, uaccess: introduce copy_from_iter_flushcache for pmem / cache-bypass operations Dan Williams
2017-06-09 20:23 ` Dan Williams
2017-06-09 20:23 ` Dan Williams
2017-06-18 8:28 ` Christoph Hellwig [this message]
2017-06-18 8:28 ` Christoph Hellwig
2017-06-18 8:28 ` Christoph Hellwig
2017-06-19 2:02 ` Dan Williams
2017-06-19 2:02 ` Dan Williams
2017-06-19 2:02 ` Dan Williams
2017-06-09 20:23 ` [PATCH v3 02/14] dm: add ->copy_from_iter() dax operation support Dan Williams
2017-06-09 20:23 ` Dan Williams
2017-06-09 20:23 ` Dan Williams
2017-06-15 0:46 ` Kani, Toshimitsu
2017-06-15 0:46 ` Kani, Toshimitsu
2017-06-15 0:46 ` Kani, Toshimitsu
2017-06-15 1:21 ` Kani, Toshimitsu
2017-06-15 1:21 ` Kani, Toshimitsu
2017-06-18 8:37 ` Christoph Hellwig
2017-06-18 8:37 ` Christoph Hellwig
2017-06-18 8:37 ` Christoph Hellwig
2017-06-19 2:04 ` Dan Williams
2017-06-19 2:04 ` Dan Williams
2017-06-19 2:04 ` Dan Williams
2017-06-09 20:24 ` [PATCH v3 03/14] filesystem-dax: convert to dax_copy_from_iter() Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:58 ` Jan Kara
2017-06-14 10:58 ` Jan Kara
2017-06-14 10:58 ` Jan Kara
2017-06-09 20:24 ` [PATCH v3 04/14] dax, pmem: introduce an optional 'flush' dax_operation Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:57 ` Jan Kara
2017-06-14 10:57 ` Jan Kara
2017-06-14 10:57 ` Jan Kara
2017-06-09 20:24 ` [PATCH v3 05/14] dm: add ->flush() dax operation support Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-15 1:44 ` Kani, Toshimitsu
2017-06-15 1:44 ` Kani, Toshimitsu
2017-06-15 1:44 ` Kani, Toshimitsu
2017-06-09 20:24 ` [PATCH v3 06/14] filesystem-dax: convert to dax_flush() Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:56 ` Jan Kara
2017-06-14 10:56 ` Jan Kara
2017-06-14 10:56 ` Jan Kara
2017-06-09 20:24 ` [PATCH v3 07/14] x86, dax: replace clear_pmem() with open coded memset + dax_ops->flush Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:55 ` Jan Kara
2017-06-14 10:55 ` Jan Kara
2017-06-14 10:55 ` Jan Kara
2017-06-09 20:24 ` [PATCH v3 08/14] x86, dax, libnvdimm: move wb_cache_pmem() to libnvdimm Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-12 0:29 ` [PATCH v4 " Dan Williams
2017-06-12 0:29 ` Dan Williams
2017-06-14 10:54 ` [PATCH v3 " Jan Kara
2017-06-14 10:54 ` Jan Kara
2017-06-14 16:49 ` Dan Williams
2017-06-14 16:49 ` Dan Williams
2017-06-14 16:49 ` Dan Williams
2017-06-15 8:11 ` Jan Kara
2017-06-15 8:11 ` Jan Kara
2017-06-15 8:11 ` Jan Kara
2017-06-18 8:40 ` Christoph Hellwig
2017-06-18 8:40 ` Christoph Hellwig
2017-06-18 8:40 ` Christoph Hellwig
2017-06-19 2:06 ` Dan Williams
2017-06-19 2:06 ` Dan Williams
2017-06-19 2:06 ` Dan Williams
2017-06-09 20:24 ` [PATCH v3 09/14] x86, libnvdimm, pmem: move arch_invalidate_pmem() " Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:49 ` Jan Kara
2017-06-14 10:49 ` Jan Kara
2017-06-09 20:24 ` [PATCH v3 10/14] pmem: remove global pmem api Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:48 ` Jan Kara
2017-06-14 10:48 ` Jan Kara
2017-06-14 10:48 ` Jan Kara
2017-06-09 20:24 ` [PATCH v3 11/14] libnvdimm, pmem: fix persistence warning Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` [PATCH v3 12/14] libnvdimm, nfit: enable support for volatile ranges Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` [PATCH v3 13/14] filesystem-dax: gate calls to dax_flush() on QUEUE_FLAG_WC Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-09 20:24 ` Dan Williams
2017-06-14 10:46 ` Jan Kara
2017-06-14 10:46 ` Jan Kara
2017-06-14 16:49 ` Dan Williams
2017-06-14 16:49 ` Dan Williams
2017-06-14 16:49 ` Dan Williams
2017-06-14 23:11 ` [PATCH v4 13/14] libnvdimm, pmem: gate cache management on QUEUE_FLAG_WC in pmem_dax_flush() Dan Williams
2017-06-14 23:11 ` Dan Williams
2017-06-15 8:09 ` Jan Kara
2017-06-15 8:09 ` Jan Kara
2017-06-18 8:45 ` [PATCH v3 13/14] filesystem-dax: gate calls to dax_flush() on QUEUE_FLAG_WC Christoph Hellwig
2017-06-18 8:45 ` Christoph Hellwig
2017-06-18 8:45 ` Christoph Hellwig
2017-06-19 2:07 ` Dan Williams
2017-06-19 2:07 ` Dan Williams
2017-06-19 2:07 ` Dan Williams
2017-06-09 20:25 ` [PATCH v3 14/14] libnvdimm, pmem: disable dax flushing when pmem is fronting a volatile region Dan Williams
2017-06-09 20:25 ` Dan Williams
2017-06-09 20:25 ` Dan Williams
2017-06-09 23:21 ` Dan Williams
2017-06-09 23:21 ` Dan Williams
2017-06-10 17:54 ` [PATCH v4 " Dan Williams
2017-06-10 17:54 ` Dan Williams
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