[Bug 106848] [GM45] igt at gem_mmap_gtt@basic-small-bo-tiledx - fail - Failed assertion: memcmp(ptr , tiled_pattern, PAGE_SIZE) == 0 (edit)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106848

--- Comment #4 from Adric Blake <promarbler14 at gmail.com> ---
I have bisected the kernel, which revealed commit
e6cbd7f2efb433d717af72aa8510a9db6f7a7e05 to be the first bad commit.

commit e6cbd7f2efb433d717af72aa8510a9db6f7a7e05 (HEAD, refs/bisect/bad)
Author: Mel Gorman <mgorman at techsingularity.net>
Date:   Thu Jul 28 15:46:50 2016 -0700

    mm, page_alloc: remove fair zone allocation policy

    The fair zone allocation policy interleaves allocation requests between
    zones to avoid an age inversion problem whereby new pages are reclaimed
    to balance a zone.  Reclaim is now node-based so this should no longer
    be an issue and the fair zone allocation policy is not free.  This patch
    removes it.

    Link:
http://lkml.kernel.org/r/1467970510-21195-30-git-send-email-mgorman@techsingularity.net
    Signed-off-by: Mel Gorman <mgorman at techsingularity.net>
    Acked-by: Vlastimil Babka <vbabka at suse.cz>
    Cc: Hillf Danton <hillf.zj at alibaba-inc.com>
    Acked-by: Johannes Weiner <hannes at cmpxchg.org>
    Cc: Joonsoo Kim <iamjoonsoo.kim at lge.com>
    Cc: Michal Hocko <mhocko at kernel.org>
    Cc: Minchan Kim <minchan at kernel.org>
    Cc: Rik van Riel <riel at surriel.com>
    Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>

git bisect log:
git bisect start
# good: [523d939ef98fd712632d93a5a2b588e477a7565e] Linux 4.7
git bisect good 523d939ef98fd712632d93a5a2b588e477a7565e
# bad: [c8d2bc9bc39ebea8437fd974fdbc21847bb897a3] Linux 4.8
git bisect bad c8d2bc9bc39ebea8437fd974fdbc21847bb897a3
# skip: [e61c10e468a42512f5fad74c00b62af5cc19f65f] sh: add device tree source
for J2 FPGA on Mimas v2 board
git bisect skip e61c10e468a42512f5fad74c00b62af5cc19f65f
# good: [6d51c813b172b4374fe7a6b732b6666f8d77bfea] drm/amdgpu: update golden
setting of stoney
git bisect good 6d51c813b172b4374fe7a6b732b6666f8d77bfea
# bad: [e7b4f2d8edbbc58c8e2c3134ff884611433ba3db] Merge branch
'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
git bisect bad e7b4f2d8edbbc58c8e2c3134ff884611433ba3db
# good: [0e6acf0204da5b8705722a5f6806a4f55ed379d6] Merge tag
'xfs-for-linus-4.8-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
git bisect good 0e6acf0204da5b8705722a5f6806a4f55ed379d6
# good: [da54bb13c02660544c286e7922b2ec660e5b1e77] Merge branch '40GbE' of
git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
git bisect good da54bb13c02660544c286e7922b2ec660e5b1e77
# good: [6a492b0f23d28e1f946cdf08e54617484400dafb] Merge tag 'scsi-misc' of
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good 6a492b0f23d28e1f946cdf08e54617484400dafb
# bad: [c3486f5376696034d0fcbef8ba70c70cfcb26f51] mm, compaction: simplify
contended compaction handling
git bisect bad c3486f5376696034d0fcbef8ba70c70cfcb26f51
# good: [92effdf8b8b214165d5437f02b0ccbe80ba244cf] [media] doc-rst: Remove
deprecated API.html document
git bisect good 92effdf8b8b214165d5437f02b0ccbe80ba244cf
# good: [818e607b57c94ade9824dad63a96c2ea6b21baf3] Merge tag 'random_for_linus'
of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random
git bisect good 818e607b57c94ade9824dad63a96c2ea6b21baf3
# good: [c4a25635b60d08853a3e4eaae3ab34419a36cfa2] mm: move vmscan writes and
file write accounting to the node
git bisect good c4a25635b60d08853a3e4eaae3ab34419a36cfa2
# bad: [35b3445e97352732f0d64a7e629f629b1d81827e] mm/zsmalloc: add
__init,__exit attribute
git bisect bad 35b3445e97352732f0d64a7e629f629b1d81827e
# bad: [68eb0731c4ce1d64aa59b244abae4e72300719b6] mm, pagevec:
release/reacquire lru_lock on pgdat change
git bisect bad 68eb0731c4ce1d64aa59b244abae4e72300719b6
# good: [e5146b12e2d02af04608301c958d95b2fc47a0f9] mm, vmscan: add classzone
information to tracepoints
git bisect good e5146b12e2d02af04608301c958d95b2fc47a0f9
# bad: [7cc30fcfd2a894589d832a192cac3dc5cd302bb8] mm: vmstat: account per-zone
stalls and pages skipped during reclaim
git bisect bad 7cc30fcfd2a894589d832a192cac3dc5cd302bb8
# bad: [3b8c0be43cb844b3cd26fac00e7663a1201176fd] mm: page_alloc: cache the
last node whose dirty limit is reached
git bisect bad 3b8c0be43cb844b3cd26fac00e7663a1201176fd
# bad: [e6cbd7f2efb433d717af72aa8510a9db6f7a7e05] mm, page_alloc: remove fair
zone allocation policy
git bisect bad e6cbd7f2efb433d717af72aa8510a9db6f7a7e05
# first bad commit: [e6cbd7f2efb433d717af72aa8510a9db6f7a7e05] mm, page_alloc:
remove fair zone allocation policy

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