Re: Slow I/O on USB media

[Andrea Vai <andrea.vai@unipv.it>]

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Hi,
Il giorno mar, 04/06/2019 alle 07.43 +0200, Greg KH ha scritto:
> On Mon, Jun 03, 2019 at 01:13:48PM +0200, Andrea Vai wrote:
> > Il giorno gio, 30/05/2019 alle 06.25 -0700, Greg KH ha scritto:
> > > [...]
> > Hi,
> > 
> > > Any chance you can use 'git bisect' to find the offending
> commit?
> > Yes, I am doing it as I managed to build the kernel from source
> 
> Great!  What did you find?

# first bad commit: [534903d60376b4989b76ec445630aa10f2bc3043]
drm/atomic: Use explicit old crtc state in
drm_atomic_add_affected_planes()

By the way, as I am not expert, is there a way to double-check that I
bisected correctly? (such as, e.g., test with the version before this
one, and then with this commit applied?)

Attached: "git bisect log" output.

Thanks, and bye,
Andrea

[-- Attachment #2: bisectlog.txt --]
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git bisect start
# bad: [cd6c84d8f0cdc911df435bb075ba22ce3c605b07] Linux 5.2-rc2
git bisect bad cd6c84d8f0cdc911df435bb075ba22ce3c605b07
# good: [8fe28cb58bcb235034b64cbbb7550a8a43fd88be] Linux 4.20
git bisect good 8fe28cb58bcb235034b64cbbb7550a8a43fd88be
# bad: [d72cb8c7d9dbd9ce820c80f3fddb56b296ba96fc] Merge tag 'riscv-for-linus-5.1-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
git bisect bad d72cb8c7d9dbd9ce820c80f3fddb56b296ba96fc
# bad: [c9bef4a651769927445900564781a9c99fdf6258] Merge tag 'pinctrl-v4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
git bisect bad c9bef4a651769927445900564781a9c99fdf6258
# bad: [e0c38a4d1f196a4b17d2eba36afff8f656a4f1de] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect bad e0c38a4d1f196a4b17d2eba36afff8f656a4f1de
# bad: [c2f1f3e0e17d94ab0c66d83e669492cb9e9a3698] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next
git bisect bad c2f1f3e0e17d94ab0c66d83e669492cb9e9a3698
# bad: [b3cc2bfe7244e848f5e8caa77bbdc72c04abd17c] Merge tag 'i3c/for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
git bisect bad b3cc2bfe7244e848f5e8caa77bbdc72c04abd17c
# good: [2ac5e38ea4203852d6e99edd3cf11f044b0a409f] Merge drm/drm-next into drm-intel-next-queued
git bisect good 2ac5e38ea4203852d6e99edd3cf11f044b0a409f
# bad: [fb878d106b7738ae7cdb513f98876b22bd6a485f] Merge tag 'exynos-drm-next-for-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next
git bisect bad fb878d106b7738ae7cdb513f98876b22bd6a485f
# bad: [818182dd1097fdc492aaef9b08755ea13274352d] Merge tag 'imx-drm-next-2018-12-03' of git://git.pengutronix.de/git/pza/linux into drm-next
git bisect bad 818182dd1097fdc492aaef9b08755ea13274352d
# bad: [ae4ba1936ab97c6a2733a243370f303da3c11839] drm/sun4i: frontend: Determine input mode based on the number of planes
git bisect bad ae4ba1936ab97c6a2733a243370f303da3c11839
# bad: [b39b5394fabc79acbaafb26b777fd348c868bf7e] drm/gem: Add drm_gem_object_funcs
git bisect bad b39b5394fabc79acbaafb26b777fd348c868bf7e
# bad: [7db647aa8b134059c3b8f26b1dd2e1aa5b91e2ca] drm/meson: Add primary plane scaling
git bisect bad 7db647aa8b134059c3b8f26b1dd2e1aa5b91e2ca
# bad: [eb8dd3abeb4dffab6c373e87d09fc3b5858ac158] drm/vc4: Prefer PPF over TPZ when dst >= 2/3 src
git bisect bad eb8dd3abeb4dffab6c373e87d09fc3b5858ac158
# bad: [783195ec1cada862d54dee8f312a60bcbba5c0e4] drm/syncobj: disable the timeline UAPI for now v2
git bisect bad 783195ec1cada862d54dee8f312a60bcbba5c0e4
# bad: [b2432adf33e8c8eb81afaba3030f0ba0145ce7d4] drm/atomic: Use explicit old/new state in drm_atomic_crtc_check()
git bisect bad b2432adf33e8c8eb81afaba3030f0ba0145ce7d4
# bad: [534903d60376b4989b76ec445630aa10f2bc3043] drm/atomic: Use explicit old crtc state in drm_atomic_add_affected_planes()
git bisect bad 534903d60376b4989b76ec445630aa10f2bc3043
# first bad commit: [534903d60376b4989b76ec445630aa10f2bc3043] drm/atomic: Use explicit old crtc state in drm_atomic_add_affected_planes()