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Groups > linux.kernel > #1580072

[PATCH BUGFIX] attempt to fix wrong scheduler selection

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Hi,
if, at boot, a legacy I/O scheduler is chosen for a device using
blk-mq, or, viceversa, a blk-mq scheduler is chosen for a device using
blk, then that scheduler is set and initialized without any check,
driving the system into an inconsistent state.

The purpose of this message is, first, to report this issue, and,
second, to propose a possible fix in case you do consider this as a
bug.

Thanks,
Paolo

Paolo Valente (1):
  block: make elevator_get robust against cross blk/blk-mq choice

 block/elevator.c | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

--
2.10.0

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[PATCH BUGFIX] attempt to fix wrong scheduler selection Paolo Valente <paolo.valente@linaro.org> - 2017-02-13 22:10 +0100
  [PATCH BUGFIX] block: make elevator_get robust against cross blk/blk-mq choice Paolo Valente <paolo.valente@linaro.org> - 2017-02-13 22:10 +0100
    Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Bart Van Assche <Bart.VanAssche@sandisk.com> - 2017-02-13 22:20 +0100
    Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Omar Sandoval <osandov@osandov.com> - 2017-02-13 23:10 +0100
      Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Jens Axboe <axboe@kernel.dk> - 2017-02-13 23:30 +0100
        Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Jens Axboe <axboe@kernel.dk> - 2017-02-14 00:20 +0100
          Re: [PATCH BUGFIX] block: make elevator_get robust against cross blk/blk-mq choice Paolo Valente <paolo.valente@linaro.org> - 2017-02-14 09:20 +0100
            Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Jens Axboe <axboe@kernel.dk> - 2017-02-14 16:20 +0100
              Re: [PATCH BUGFIX] block: make elevator_get robust against cross blk/blk-mq choice Paolo Valente <paolo.valente@linaro.org> - 2017-02-14 16:50 +0100
        Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Hannes Reinecke <hare@suse.de> - 2017-02-14 08:00 +0100
          Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Omar Sandoval <osandov@osandov.com> - 2017-02-14 08:10 +0100
            Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Hannes Reinecke <hare@suse.de> - 2017-02-14 08:20 +0100
          Re: [PATCH BUGFIX] block: make elevator_get robust against cross  blk/blk-mq choice Jens Axboe <axboe@kernel.dk> - 2017-02-14 16:20 +0100

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