lkml.org 
[lkml]   [2017]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH v2 1/2] hpsa: limit transfer length to 1MB
    On Fri, Jun 23, 2017 at 05:40:05PM +0800, Yadan Fan wrote:
    > The hpsa firmware will bypass the cache for any request larger
    > than 1MB, so we should cap the request size to avoid any
    > performance degradation in kernels later than v4.3
    >
    > This degradation is caused from d2be537c3ba3568acd79cd178327b842e60d035e,
    > which changed max_sectors_kb to 1280k, but the hardware is able to
    > work fine with it, so the true fix should be from hpsa driver.
    >
    > Signed-off-by: Yadan Fan <ydfan@suse.com>
    > ---

    Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
    --
    Johannes Thumshirn Storage
    jthumshirn@suse.de +49 911 74053 689
    SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
    GF: Felix Imendörffer, Jane Smithard, Graham Norton
    HRB 21284 (AG Nürnberg)
    Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850

    \
     
     \ /
      Last update: 2017-06-23 15:02    [W:4.727 / U:0.000 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site