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https://git.proxmox.com/git/mirror_zfs.git
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9e5a297de6
Page writebacks with WB_SYNC_NONE can take several seconds to complete since they wait for the transaction group to close before being committed. This is usually not a problem since the caller does not need to wait. However, if we're simultaneously doing a writeback with WB_SYNC_ALL (e.g via msync), the latter can block for several seconds (up to zfs_txg_timeout) due to the active WB_SYNC_NONE writeback since it needs to wait for the transaction to complete and the PG_writeback bit to be cleared. This commit deals with 2 cases: - No page writeback is active. A WB_SYNC_ALL page writeback starts and even completes. But when it's about to check if the PG_writeback bit has been cleared, another writeback with WB_SYNC_NONE starts. The sync page writeback ends up waiting for the non-sync page writeback to complete. - A page writeback with WB_SYNC_NONE is already active when a WB_SYNC_ALL writeback starts. The WB_SYNC_ALL writeback ends up waiting for the WB_SYNC_NONE writeback. The fix works by carefully keeping track of active sync/non-sync writebacks and committing when beneficial. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Shaan Nobee <sniper111@gmail.com> Closes #12662 Closes #12790
223 lines
2.8 KiB
INI
223 lines
2.8 KiB
INI
#
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# Copyright (c) 2016, 2019 by Delphix. All rights reserved.
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# These variables are used by zfs-tests.sh to constrain which utilities
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# may be used by the suite. The suite will create a directory which is
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# the only element of $PATH and create symlinks from that dir to the
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# binaries listed below.
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#
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# Please keep the contents of each variable sorted for ease of reading
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# and maintenance.
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#
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export SYSTEM_FILES_COMMON='arp
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awk
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base64
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basename
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bc
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bunzip2
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bzcat
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cat
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chgrp
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chmod
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chown
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cksum
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cmp
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cp
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cpio
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cut
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date
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dd
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df
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diff
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dirname
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dmesg
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du
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echo
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env
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expr
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false
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file
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find
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fio
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getconf
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getent
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getfacl
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grep
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gunzip
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gzip
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head
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hostname
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id
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iostat
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kill
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ksh
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ln
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logname
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ls
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mkdir
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mknod
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mktemp
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mount
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mv
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net
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od
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openssl
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pamtester
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pax
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pgrep
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ping
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pkill
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printenv
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printf
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ps
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pwd
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python3
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quotaon
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readlink
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rm
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rmdir
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scp
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script
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sed
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seq
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setfacl
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sh
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sleep
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sort
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ssh
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stat
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strings
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su
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sudo
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sum
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swapoff
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swapon
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sync
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tail
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tar
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tee
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timeout
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touch
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tr
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true
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truncate
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umask
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umount
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uname
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uniq
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uuidgen
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vmstat
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wait
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wc
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which
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xargs'
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export SYSTEM_FILES_FREEBSD='chflags
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compress
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diskinfo
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dumpon
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fsck
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getextattr
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gpart
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jail
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jexec
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jls
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lsextattr
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md5
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mdconfig
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mkfifo
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newfs
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pw
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rmextattr
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setextattr
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sha256
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showmount
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swapctl
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sysctl
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uncompress'
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export SYSTEM_FILES_LINUX='attr
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bash
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blkid
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blockdev
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chattr
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dmidecode
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exportfs
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fallocate
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fdisk
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free
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getfattr
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groupadd
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groupdel
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groupmod
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hostid
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losetup
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lsattr
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lsblk
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lscpu
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lsmod
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lsscsi
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md5sum
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mkswap
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modprobe
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mpstat
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nproc
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parted
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perf
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setenforce
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setfattr
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sha256sum
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udevadm
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useradd
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userdel
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usermod'
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export ZFS_FILES='zdb
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zfs
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zhack
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zinject
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zpool
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ztest
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raidz_test
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arc_summary
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arcstat
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dbufstat
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mount.zfs
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zed
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zgenhostid
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zstream
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zfs_ids_to_path
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zpool_influxdb'
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export ZFSTEST_FILES='badsend
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btree_test
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chg_usr_exec
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devname2devid
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dir_rd_update
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draid
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file_check
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file_trunc
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file_write
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get_diff
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largest_file
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libzfs_input_check
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mkbusy
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mkfile
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mkfiles
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mktree
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mmap_exec
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mmap_libaio
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mmap_seek
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mmap_sync
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mmapwrite
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nvlist_to_lua
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randfree_file
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randwritecomp
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readmmap
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rename_dir
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rm_lnkcnt_zero_file
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send_doall
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threadsappend
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user_ns_exec
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xattrtest
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stride_dd'
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