check_disk_size_change(9) [centos man page]

CHECK_DISK_SIZE_CHAN(9) 					   The Linux VFS					   CHECK_DISK_SIZE_CHAN(9)

NAME

       check_disk_size_change - checks for disk size change and adjusts bdev size.

SYNOPSIS

       void check_disk_size_change(struct gendisk * disk, struct block_device * bdev);

ARGUMENTS

       disk
	   struct gendisk to check

       bdev
	   struct bdev to adjust.

DESCRIPTION

       This routine checks to see if the bdev size does not match the disk size and adjusts it if it differs.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   CHECK_DISK_SIZE_CHAN(9)

PROBE::IOBLOCK_TRACE(3stap)				  IO Scheduler and block IO Taps			       PROBE::IOBLOCK_TRACE(3stap)

NAME

       probe::ioblock_trace.request - Fires just as a generic block I/O request is created for a bio.

SYNOPSIS

       ioblock_trace.request

VALUES

       None

DESCRIPTION

       name - name of the probe point q - request queue on which this bio was queued.  devname - block device name ino - i-node number of the
       mapped file bytes_done - number of bytes transferred sector - beginning sector for the entire bio flags - see below BIO_UPTODATE 0 ok after
       I/O completion BIO_RW_BLOCK 1 RW_AHEAD set, and read/write would block BIO_EOF 2 out-out-bounds error BIO_SEG_VALID 3 nr_hw_seg valid
       BIO_CLONED 4 doesn't own data BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6 contains user pages BIO_EOPNOTSUPP 7 not supported

       rw - binary trace for read/write request vcnt - bio vector count which represents number of array element (page, offset, length) which make
       up this I/O request idx - offset into the bio vector array phys_segments - number of segments in this bio after physical address coalescing
       is performed.  size - total size in bytes bdev - target block device bdev_contains - points to the device object which contains the
       partition (when bio structure represents a partition) p_start_sect - points to the start sector of the partition structure of the device

CONTEXT

       The process makes block I/O request

SystemTap Tapset Reference					     June 2014					       PROBE::IOBLOCK_TRACE(3stap)