mirror_zfs/module/os/linux/zfs
Rob Norris 0cf14bf4b5 Linux 6.12: PG_error flag was removed
torvalds/linux@09022bc196 removes the flag, and the corresponding
SetPageError() and ClearPageError() macros, with no replacement offered.

Going back through the upstream history, use of this flag has been
gradually removed over the last year as part of the long tail of
converting everything to folios. Interesting tidbit comments from
torvalds/linux@29e9412b25 and torvalds/linux@420e05d0de suggest that
this flag has not been used meaningfully since page writeback failures
started being recorded in errseq_t instead (the whole "fsyncgate" thing,
~2017, around torvalds/linux@8ed1e46aaf).

Given that, it's possible that since perhaps Linux 4.13 we haven't been
getting anything by setting the flag. I don't know if that's true and/or
if there's something we should be doing instead, but my gut feel is that
its probably fine we only use the page cache as a proxy to allow mmap()
to work, rather than backing IO with it.

As such, I'm expecting that removing this will do no harm, but I'm
leaving it in for older kernels to maintain status quo, and if there is
an overall better way, that is left for a future change.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16582
2024-10-01 13:54:05 -07:00
..
abd_os.c linux/abd_os: remove kernel version check for compound page support 2024-09-19 15:45:05 -07:00
arc_os.c arc_os: split userspace and Linux kernel code 2024-09-19 15:48:54 -07:00
mmp_os.c Cleanup: 64-bit kernel module parameters should use fixed width types 2022-10-13 10:03:29 -07:00
policy.c config: remove HAVE_HAS_CAPABILITY 2024-09-18 11:23:51 -07:00
qat_compress.c Intel QAT 1.7 compatibility 2023-09-07 14:38:17 -07:00
qat_crypt.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
qat.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_misc_os.c Selectable block allocators 2023-09-01 18:00:30 -07:00
trace.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_disk.c config: remove HAVE_BIO_SET_DEV 2024-09-18 11:23:51 -07:00
vdev_file.c zfs_file: rename zfs_file_fallocate to zfs_file_deallocate 2024-09-18 11:35:04 -07:00
vdev_label_os.c RAID-Z expansion feature 2023-11-08 10:19:41 -08:00
zfs_acl.c Fix an uninitialized data access (#16511) 2024-09-10 09:08:45 -07:00
zfs_ctldir.c config: remove HAVE_FILEMAP_RANGE_HAS_PAGE 2024-09-18 11:23:50 -07:00
zfs_debug.c zfs_debug: specific variant for userspace 2024-09-19 15:49:50 -07:00
zfs_dir.c Support for longnames for files/directories (Linux part) 2024-10-01 13:40:27 -07:00
zfs_file_os.c zfs_file: rename zfs_file_fallocate to zfs_file_deallocate 2024-09-18 11:35:04 -07:00
zfs_ioctl_os.c linux: log a scary warning when used with an experimental kernel 2024-09-23 10:44:54 -07:00
zfs_racct.c Adding Direct IO Support 2024-09-14 13:47:59 -07:00
zfs_sysfs.c Introduce kmem_scnprintf() 2022-10-29 13:05:11 -07:00
zfs_uio.c config: remove HAVE_GET_USER_PAGES_* 2024-09-18 11:23:51 -07:00
zfs_vfsops.c Support for longnames for files/directories (Linux part) 2024-10-01 13:40:27 -07:00
zfs_vnops_os.c Support for longnames for files/directories (Linux part) 2024-10-01 13:40:27 -07:00
zfs_znode_os.c Linux 6.12: PG_error flag was removed 2024-10-01 13:54:05 -07:00
zio_crypt.c ZIL: Assert record sizes in different places 2023-11-28 13:35:14 -08:00
zpl_ctldir.c config: remove HAVE_VFS_ITERATE/HAVE_VFS_ITERATE_SHARED 2024-09-18 11:23:50 -07:00
zpl_export.c Support for longnames for files/directories (Linux part) 2024-10-01 13:40:27 -07:00
zpl_file_range.c config: remove HAVE_VFS_COPY_FILE_RANGE 2024-09-18 11:23:50 -07:00
zpl_file.c Avoid BUG in migrate_folio_extra 2024-09-26 08:57:09 -07:00
zpl_inode.c Support for longnames for files/directories (Linux part) 2024-10-01 13:40:27 -07:00
zpl_super.c config: remove HAVE_INODE_SET_IVERSION 2024-09-18 11:23:50 -07:00
zpl_xattr.c Allocate zap_attribute_t from kmem instead of stack 2024-10-01 13:39:08 -07:00
zvol_os.c cityhash: replace invocations with specialized versions when possible 2024-09-19 15:19:17 -07:00