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    SubjectRe: [PATCH] arch/{mips,sparc,microblaze,powerpc}: Don't enable pagefault/preempt twice
    On Wed, Jun 03, 2020 at 11:22:26PM -0700, Ira Weiny wrote:
    > On Wed, Jun 03, 2020 at 04:44:17PM -0700, Guenter Roeck wrote:
    >
    > With linux-next on sparc I too see the spinlock issue; something like:
    >
    > ...
    > Starting syslogd: BUG: spinlock recursion on CPU#0, S01syslogd/139
    > lock: 0xf53ef350, .magic: dead4ead, .owner: S01syslogd/139, .owner_cpu: 0
    > CPU: 0 PID: 139 Comm: S01syslogd Not tainted 5.7.0-next-20200603 #1
    > [f0067d00 :
    > do_raw_spin_lock+0xa8/0xd8 ]
    > [f00d598c :
    > copy_page_range+0x328/0x804 ]
    > [f0025c34 :
    > dup_mm+0x334/0x434 ]
    > [f0027198 :
    > copy_process+0x1248/0x12d4 ]
    > [f00273b8 :
    > _do_fork+0x54/0x30c ]
    > [f00276e4 :
    > do_fork+0x5c/0x6c ]
    > [f000de44 :
    > sparc_do_fork+0x18/0x38 ]
    > [f000b7f4 :
    > do_syscall+0x34/0x40 ]
    > [5010cd4c :
    > 0x5010cd4c ]
    >
    >
    > I'm going to bisect between there and HEAD.

    The sparc issue should be fixed by

    https://lore.kernel.org/lkml/20200526173302.377-1-will@kernel.org

    > Ira

    --
    Sincerely yours,
    Mike.

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