[Bugme-new] [Bug 41472] New: Slow files copying into a usb drive

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Sun Aug 21 07:04:46 PDT 2011


https://bugzilla.kernel.org/show_bug.cgi?id=41472

           Summary: Slow files copying into a usb drive
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 3.0
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
        AssignedTo: io_other at kernel-bugs.osdl.org
        ReportedBy: aheaven87 at gmail.com
        Regression: No


Description:
I am suffering from very slow files copying and it does not matter is it an usb
1 or 2 devise. I mean that it happens both with uhci and ehci (can not test
xhci because haven't a usb 3.0 device). During files copying KDE notification
show me the progress and all seems to be alright, but I can not umount the
devise after the copy operation was finished (orienting by KDE's
notifications). I always receive an error message that devise is busy, when
trying to umount it. htop shows high I/O that you can see on the screenshot. It
also does not matter was this device mounted by dolphin or by hand in console.
Also, a few upgrades ago (perhaps with kernel 2.6.38) arch hung tightly during
copying on usb drive and came to life after operations complete (or after hard
devise disconnecting)

Additional info:
I noticed it a long time ago, not sure in which kernel version. Already tried
lts and 3.0 kernels. Now I trying with 2.6.39-ck and it also has the same
problem.

Steps to reproduce:
Just connect an usb devise and try to copy files on it. I tried it with my
phone flash card and with different usb drives and it is reproducible with both
small and big files.

Hardware:
I have the Intel i7 processor and the Asus Sabertooth motherboard on the X58
chipset.

Please tell me if I could provide some useful information.
Bug report on bugs.archlinux.org with a few comments —
https://bugs.archlinux.org/task/25461

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