[lkml]   [2012]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Bad SSD performance with recent kernels
    On Sat, Jan 28, 2012 at 02:33:31PM +0100, Eric Dumazet wrote:
    > Le samedi 28 janvier 2012 à 20:51 +0800, Wu Fengguang a écrit :
    > > Would you please create a filesystem and large file on sda and run the
    > > tests on the file? There was some performance bug on reading the raw
    > > /dev/sda device file..
    > Hmm... latest kernel has the performance bug right now.
    > Really if /dev/sda is slow, we are stuck.

    What's the block size? If it's < 4k, performance might be hurt.

    blockdev --getbsz /dev/sda

    > FYI, I started a bisection.

    Thank you! If the bisection would take much human time, it should be
    easier to collect some blktrace data on reading /dev/sda for analyzes.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2012-01-29 07:11    [W:0.020 / U:2.208 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site