• Bart Van Assche's avatar
    blkdev_report_zones_ioctl(): Use vmalloc() to allocate large buffers · 1cbd5ece
    Bart Van Assche authored
    commit 327ea4adcfa37194739f1ec7c70568944d292281 upstream.
    
    Avoid that complaints similar to the following appear in the kernel log
    if the number of zones is sufficiently large:
    
      fio: page allocation failure: order:9, mode:0x140c0c0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null)
      Call Trace:
      dump_stack+0x63/0x88
      warn_alloc+0xf5/0x190
      __alloc_pages_slowpath+0x8f0/0xb0d
      __alloc_pages_nodemask+0x242/0x260
      alloc_pages_current+0x6a/0xb0
      kmalloc_order+0x18/0x50
      kmalloc_order_trace+0x26/0xb0
      __kmalloc+0x20e/0x220
      blkdev_report_zones_ioctl+0xa5/0x1a0
      blkdev_ioctl+0x1ba/0x930
      block_ioctl+0x41/0x50
      do_vfs_ioctl+0xaa/0x610
      SyS_ioctl+0x79/0x90
      do_syscall_64+0x79/0x1b0
      entry_SYSCALL_64_after_hwframe+0x3d/0xa2
    
    Fixes: 3ed05a98 ("blk-zoned: implement ioctls")
    Signed-off-by: 's avatarBart Van Assche <bart.vanassche@wdc.com>
    Cc: Shaun Tancheff <shaun.tancheff@seagate.com>
    Cc: Damien Le Moal <damien.lemoal@hgst.com>
    Cc: Christoph Hellwig <hch@lst.de>
    Cc: Martin K. Petersen <martin.petersen@oracle.com>
    Cc: Hannes Reinecke <hare@suse.com>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: 's avatarJens Axboe <axboe@kernel.dk>
    Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    1cbd5ece