From: Logan Gunthorpe <logang-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
To: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>,
Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Cc: linux-nvdimm-y27Ovi1pjclAfugRpC6u6w@public.gmane.org,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Sumit Semwal
<sumit.semwal-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
devel-gWbeCf7V1WCQmaza687I9mD2FQJk+8+b@public.gmane.org,
"James E.J. Bottomley"
<jejb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Matthew Wilcox <mawilcox-0li6OtcxBFHby3iVrkZq2A@public.gmane.org>,
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open-iscsi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org,
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Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
"Martin K. Petersen"
<martin.petersen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-crypto-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v2 01/21] scatterlist: Introduce sg_map helper functions
Date: Thu, 27 Apr 2017 09:57:58 -0600 [thread overview]
Message-ID: <cb1ed262-110b-2a6c-f9da-e41c2fc0969d@deltatee.com> (raw)
In-Reply-To: <20170427152720.GA7662-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
On 27/04/17 09:27 AM, Jason Gunthorpe wrote:
> On Thu, Apr 27, 2017 at 08:53:38AM +0200, Christoph Hellwig wrote:
> How about first switching as many call sites as possible to use
> sg_copy_X_buffer instead of kmap?
Yeah, I could look at doing that first.
One problem is we might get more Naks of the form of Herbert Xu's who
might be concerned with the performance implications.
These are definitely a bit more invasive changes than thin wrappers
around kmap calls.
> A random audit of Logan's series suggests this is actually a fairly
> common thing.
It's not _that_ common but there are a significant fraction. One of my
patches actually did this to two places that seemed to be reimplementing
the sg_copy_X_buffer logic.
Thanks,
Logan
next prev parent reply other threads:[~2017-04-27 15:57 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-25 18:20 [PATCH v2 00/21] Introduce common scatterlist map function Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 02/21] libiscsi: Add an internal error code Logan Gunthorpe
2017-04-26 7:48 ` Christoph Hellwig
2017-04-25 18:20 ` [PATCH v2 03/21] libiscsi: Make use of new the sg_map helper function Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 05/21] drm/i915: Make use of the new " Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 06/21] crypto: hifn_795x: " Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 09/21] staging: unisys: visorbus: " Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 15/21] xen-blkfront: " Logan Gunthorpe
[not found] ` <1493144468-22493-16-git-send-email-logang-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-26 7:37 ` Roger Pau Monné
[not found] ` <20170426073720.okv33ly2ldepilti-aUbyMND+kyB2Oba8jWPag5QscXo+jHNAQQ4Iyu8u01E@public.gmane.org>
2017-04-27 20:19 ` Logan Gunthorpe
[not found] ` <df6586e2-7d45-6b0b-facb-4dea882df06e-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-27 20:53 ` Jason Gunthorpe
[not found] ` <20170427205339.GB26330-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-04-27 21:53 ` Logan Gunthorpe
[not found] ` <02ba3c7b-5fab-a06c-fbbf-c3be1c0fae1b-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-27 22:11 ` Jason Gunthorpe
[not found] ` <20170427221132.GA30036-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-04-27 23:03 ` Logan Gunthorpe
[not found] ` <3a7c0d27-0744-4e91-b37f-3885c50455e8-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-27 23:20 ` Jason Gunthorpe
2017-04-27 23:29 ` Logan Gunthorpe
[not found] ` <1493144468-22493-1-git-send-email-logang-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-25 18:20 ` [PATCH v2 01/21] scatterlist: Introduce sg_map helper functions Logan Gunthorpe
[not found] ` <1493144468-22493-2-git-send-email-logang-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-26 7:44 ` Christoph Hellwig
2017-04-26 18:11 ` Logan Gunthorpe
2017-04-27 6:53 ` Christoph Hellwig
[not found] ` <20170427065338.GA20677-jcswGhMUV9g@public.gmane.org>
2017-04-27 15:27 ` Jason Gunthorpe
[not found] ` <20170427152720.GA7662-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-04-27 15:57 ` Logan Gunthorpe [this message]
2017-04-27 15:44 ` Logan Gunthorpe
[not found] ` <20170426074416.GA7936-jcswGhMUV9g@public.gmane.org>
2017-04-27 20:13 ` Logan Gunthorpe
2017-04-26 8:59 ` Christian König
2017-04-26 23:30 ` Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 04/21] target: Make use of the new sg_map function at 16 call sites Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 07/21] crypto: shash, caam: Make use of the new sg_map helper function Logan Gunthorpe
2017-04-27 3:56 ` Herbert Xu
[not found] ` <20170427035603.GA32212-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2017-04-27 15:45 ` Logan Gunthorpe
[not found] ` <94123cbf-3287-f05e-7267-0bcf08ab0a8b-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-28 6:30 ` Herbert Xu
[not found] ` <20170428063039.GB6817-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2017-04-28 16:53 ` Logan Gunthorpe
[not found] ` <5a08708b-c3b8-41fe-96de-607a109eacbd-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org>
2017-04-28 17:51 ` Herbert Xu
2017-04-28 19:01 ` Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 08/21] dm-crypt: Make use of the new sg_map helper in 4 call sites Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 10/21] RDS: Make use of the new sg_map helper function Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 11/21] scsi: ipr, pmcraid, isci: Make use of the new sg_map helper Logan Gunthorpe
2017-04-25 18:20 ` [PATCH v2 12/21] scsi: hisi_sas, mvsas, gdth: Make use of the new sg_map helper function Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 13/21] scsi: arcmsr, ips, megaraid: " Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 14/21] scsi: libfc, csiostor: Change to sg_copy_buffer in two drivers Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 16/21] mmc: sdhci: Make use of the new sg_map helper function Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 17/21] mmc: spi: " Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 18/21] mmc: tmio: " Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 19/21] mmc: sdricoh_cs: " Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 21/21] memstick: " Logan Gunthorpe
2017-04-25 18:21 ` [PATCH v2 20/21] mmc: tifm_sd: " Logan Gunthorpe
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