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Date: Tue, 22 Sep 2020 12:52:06 +0200 From: SeongJae Park <sjpark@...zon.com> To: <konrad.wilk@...cle.com>, <roger.pau@...rix.com>, <jgross@...e.com> CC: SeongJae Park <sjpark@...zon.de>, <axboe@...nel.dk>, <aliguori@...zon.com>, <amit@...nel.org>, <mheyne@...zon.de>, <pdurrant@...zon.co.uk>, <linux-block@...r.kernel.org>, <xen-devel@...ts.xenproject.org>, <linux-kernel@...r.kernel.org> Subject: [PATCH v2 0/3] xen-blk(back|front): Let users disable persistent grants From: SeongJae Park <sjpark@...zon.de> Persistent grants feature provides high scalability. On some small systems, however, it could incur data copy overheads[1] and thus it is required to be disabled. But, there is no option to disable it. For the reason, this commit adds module parameters for disabling of the feature. [1] https://wiki.xen.org/wiki/Xen_4.3_Block_Protocol_Scalability Baseline and Complete Git Trees =============================== The patches are based on the v5.9-rc6. You can also clone the complete git tree: $ git clone git://github.com/sjp38/linux -b pgrants_disable_v2 The web is also available: https://github.com/sjp38/linux/tree/pgrants_disable_v2 Patch History ============= Changes from v1 (https://lore.kernel.org/linux-block/20200922070125.27251-1-sjpark@amazon.com/) - use 'bool' parameter type (Jürgen Groß) - Let blkfront can also disable the feature from its side (Roger Pau Monné) - Avoid unnecessary xenbus_printf (Roger Pau Monné) - Update frontend parameter doc SeongJae Park (3): xen-blkback: add a parameter for disabling of persistent grants xen-blkfront: add a parameter for disabling of persistent grants xen-blkfront: Apply changed parameter name to the document .../ABI/testing/sysfs-driver-xen-blkback | 9 ++++++ .../ABI/testing/sysfs-driver-xen-blkfront | 11 +++++++- drivers/block/xen-blkback/xenbus.c | 28 ++++++++++++++----- drivers/block/xen-blkfront.c | 28 +++++++++++++------ 4 files changed, 60 insertions(+), 16 deletions(-) -- 2.17.1
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