Messages in this thread | | | Date | Mon, 5 Jan 2015 20:42:03 +0100 | From | Christoph Hellwig <> | Subject | Re: scsi: non atomic allocation in mempool_alloc in atomic context |
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On Mon, Jan 05, 2015 at 12:38:04PM -0700, Jens Axboe wrote: > That was true in earlier kernels as well, going back a few versions at > least, preempt was disabled on calling __blk_mq_run_hw_queue(). Just > checked, and 3.16 and later have that as the behaviour. The only change > in 3.19 some shuffling around to avoid double preempt_disable in some > cases, it's now using get_cpu() and friends. > > So we probably want do mark that as stable so we reach back to when > scsi-mq was added, unless the originally referenced patch getting rid of > the gfp_t mask didn't have the issue.
Before that commit we always passed down GFP_ATOMIC, so we'll only need the patch for 3.19.
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