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writeback_in_progress(9) [centos man page]

WRITEBACK_IN_PROGRES(9) 					   The Linux VFS					   WRITEBACK_IN_PROGRES(9)

NAME
writeback_in_progress - determine whether there is writeback in progress SYNOPSIS
int writeback_in_progress(struct backing_dev_info * bdi); ARGUMENTS
bdi the device's backing_dev_info structure. DESCRIPTION
Determine whether there is writeback waiting to be handled against a backing device. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 WRITEBACK_IN_PROGRES(9)

Check Out this Related Man Page

VIRTIO_BLK(4)						   BSD Kernel Interfaces Manual 					     VIRTIO_BLK(4)

NAME
virtio_blk -- VirtIO Block driver SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device virtio_blk Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): virtio_blk_load="YES" DESCRIPTION
The virtio_blk device driver provides support for VirtIO block devices. LOADER TUNABLES
Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5). hw.vtblk.no_ident hw.vtblk.X.no_ident These tunables disable retrieving the device identification string from the hypervisor either globally or per-device. The default value is 0. hw.vtblk.writecache_mode hw.vtblk.X.writecache_mode These tunables determine the write cache mode globally or per-device. The mode can changed only if the ConfigWCE feature is negoti- ated. Set to 0 for writethrough mode, 1 for writeback mode, and -1 to leave it as-is. The default value is to leave as-is. SYSCTL VARIABLES
The following variables are available as sysctl(8) variables. dev.vtblk.X.writecache_mode The write cache mode of the device can be either writethrough (0) or writeback (1). If the ConfigWCE feature is negotiated, the write cache mode can be toggled between writethrough and writeback. SEE ALSO
virtio(4) HISTORY
The virtio_blk driver was written by Bryan Venteicher <bryanv@FreeBSD.org>. It first appeared in FreeBSD 9.0. BSD
July 2, 2013 BSD
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