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a3d8a25736
Currently, for zoned disks, since blk_revalidate_disk_zones() requires the disk capacity to be set already to operate correctly, zones revalidation can only be done on the second revalidate scan once the gendisk capacity is set at the end of the first scan. As a result, if zone revalidation fails, there is no second chance to recover from the failure and the disk capacity is changed to 0, with the disk left unusable. This can be improved by shuffling around code, specifically, by moving the call to sd_zbc_revalidate_zones() from sd_zbc_read_zones() to the end of sd_revalidate_disk(), after set_capacity_revalidate_and_notify() is called to set the gendisk capacity. With this change, if sd_zbc_revalidate_zones() fails on the first scan, the second scan will call it again to recover, if possible. Using the new struct scsi_disk fields rev_nr_zones and rev_zone_blocks, sd_zbc_revalidate_zones() does actual work only if it detects a change with the disk zone configuration. This means that for a successful zones revalidation on the first scan, the second scan will not cause another heavy full check. While at it, remove the unecesary "extern" declaration of sd_zbc_read_zones(). Link: https://lore.kernel.org/r/20200731054928.668547-1-damien.lemoal@wdc.com Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.