Situacija sleduju6aja:

freebsd53_2# uname -r              
5.3-RELEASE
freebsd53_2# cat /etc/rc.conf | grep swap
swapfile="/tmp/swap"            # Set to name of swapfile if aux swapfile desired.
swapoff="YES"           # Remove swap partitions upon shutdown

Tak vot pri perehode iz multiuser v single user rezim swap particii, kotorije
bili dobavleni v sistemu ispolzuja swapfile zna4enije v /etc/rc.conf faile
ostajutca. Swap particii, kotorije registrirujutca v sisteme ispolzuja /etc/fstab
fail mozno ubrat pri prehode v single user rezim prisvoiv swapoff peremennoi
zna4enije YES v faile /etc/rc.conf.
Pri obratnom perehode iz single user rezima v miltiuser rezim i pri uslovii 4to
zna4enije swapfile ne ravno NO, v sisteme povtorno registrirjetca/dobavlajetca e6e
odna swap particija dla odnogo i togo-ze faila. V takom slu4aje summarnij razmer sveh
swap particij v sisteme neveren da i kadznij raz ispolzujetca novoje md(4) ustroistvo.

Multiuser:
freebsd53_2# swapctl -l  
Device:       1024-blocks     Used:
/dev/ad0s1b      299848         0
/dev/md1          30720         0
    
Multiuser -> Single user:
# swapctl -l
Device:       512-blocks      Used:
/dev/md1           61440          0

Single user -> Multiuser:
freebsd53_2# swapctl -sl
Device:       1024-blocks     Used:
/dev/md1          30720         0
/dev/md2          30720         0
/dev/ad0s1b      299848         0
Total:           361288         0

Mne kazetca eto ne sovsem vernim povedenijem.Hotja vozmozno ja 4to-to nepravilno ponal
v nastroikah, odnako dobitca togo, 4tobi "uborka" swap particij proishodila s ispolzovanijem
originalnih sredstv mne ne udalos. Posemu ja vnes nebol6ije izmenenija v start/stop skripti.
Hotel bi usli6at mnenije nadora po etomu povodu.

freebsd53_2# cat /root/addswap.patch
--- addswap     Sat Nov  27 23:31:00 2004
***************
*** 14,20 ****
  
  name="addswap"
  start_cmd="addswap_start"
! stop_cmd=":"
  
  addswap_start()
  {
--- 14,20 ----
  
  name="addswap"
  start_cmd="addswap_start"
! stop_cmd="addswap_stop"
  
  addswap_start()
  {
*************** addswap_start()
*** 26,31 ****
--- 26,48 ----
                        echo "Adding ${swapfile} as additional swap"
                        mdev=`mdconfig -a -t vnode -f ${swapfile}` && swapon /dev/${mdev}
                fi
+               ;;
+       esac
+ }
+
+
+ addswap_stop()
+ {
+       case ${swapfile} in
+       [Nn][Oo] | '')
+               ;;
+       *)
+               for i in `swapctl -l | grep '^/dev/md[0-9]*' | cut -d ' ' -f 1 -`; do
+                       echo "Removing ${swapfile} as additional swap"
+                       swapoff ${i}
+                       unit=`echo ${i} | sed 's/\/dev\/md//'`
+                       mdconfig -d -u ${unit}
+               done
                ;;
        esac
  }
freebsd53_2# cat /root/swap1.patch
--- /etc/rc.d/swap1     Sat Nov 27 23:33:17 2004
***************
*** 13,19 ****
  name="swap1"
  stop_precmd='checkyesno swapoff || [ -n "$rc_force" ]'
  start_cmd='swapon -a'
! stop_cmd='swapoff -a'
  
  load_rc_config swap
  run_rc_command "$1"
--- 13,27 ----
  name="swap1"
  stop_precmd='checkyesno swapoff || [ -n "$rc_force" ]'
  start_cmd='swapon -a'
! stop_cmd='swap1_stop'
!
! swap1_stop()
! {
!
!       swapoff -a
!       /etc/rc.d/addswap stop
!
! }
  
  load_rc_config swap
  run_rc_command "$1"
freebsd53_2# chmod 755 addswap swap1
freebsd53_2# patch < /root/addswap.patch
Hmm...  Looks like a new-style context diff to me...
The text leading up to this was:
--------------------------
|--- addswap    Sat Nov  27 23:31:00 2004
--------------------------
Patching file addswap using Plan A...
Hunk #1 succeeded at 14.
Hunk #2 succeeded at 26.
done
freebsd53_2# patch < /root/swap1.patch
Hmm...  Looks like a new-style context diff to me...
The text leading up to this was:
--------------------------
|--- /etc/rc.d/swap1    Sat Nov 27 23:33:17 2004
--------------------------
Patching file swap1 using Plan A...
Hunk #1 succeeded at 13.
done
freebsd53_2# chmod 555 addswap swap1
freebsd53_2# mv addswap.orig swap1.orig /root/
freebsd53_2# ls -l addswap swap1
-r-xr-xr-x  1 root  wheel  862 Sep  3 00:13 addswap
-r-xr-xr-x  1 root  wheel  432 Sep  3 00:13 swap1

Multiuser:
freebsd53_2# swapctl -l  
Device:       1024-blocks     Used:
/dev/ad0s1b      299848         0
/dev/md1          30720         0
    
Multiuser -> Single user:
# swapctl -l
Device:       512-blocks      Used:

Single user -> Multiuser:
freebsd53_2# swapctl -sl
Device:       1024-blocks     Used:
/dev/ad0s1b      299848         0
/dev/md0          30720         0
Total:           330568         0

P.S. Srazu izvinajus za translit.

• Komentarii privetstvujutca,lavr, 11:07 , 29-Ноя-04
  • Komentarii privetstvujutca,Brainbug, 11:18 , 29-Ноя-04

>Situacija sleduju6aja:
>
>freebsd53_2# uname -r
>5.3-RELEASE
>freebsd53_2# cat /etc/rc.conf | grep swap
>swapfile="/tmp/swap"            
># Set to name of swapfile if aux swapfile desired.
>swapoff="YES"           #
>Remove swap partitions upon shutdown
>
>Tak vot pri perehode iz multiuser v single user rezim swap particii,
>kotorije
>bili dobavleni v sistemu ispolzuja swapfile zna4enije v /etc/rc.conf faile
>ostajutca. Swap particii, kotorije registrirujutca v sisteme ispolzuja /etc/fstab
>fail mozno ubrat pri prehode v single user rezim prisvoiv swapoff peremennoi
>
>zna4enije YES v faile /etc/rc.conf.
>Pri obratnom perehode iz single user rezima v miltiuser rezim i pri
>uslovii 4to
>zna4enije swapfile ne ravno NO, v sisteme povtorno registrirjetca/dobavlajetca e6e
>odna swap particija dla odnogo i togo-ze faila. V takom slu4aje summarnij
>razmer sveh
>swap particij v sisteme neveren da i kadznij raz ispolzujetca novoje md(4)
>ustroistvo.
>
>Multiuser:
>freebsd53_2# swapctl -l
>Device:       1024-blocks    
>Used:
>/dev/ad0s1b      299848      
>   0
>/dev/md1          30720  
>       0
>
>Multiuser -> Single user:
># swapctl -l
>Device:       512-blocks    
> Used:
>/dev/md1           61440
>         0
>
>Single user -> Multiuser:
>freebsd53_2# swapctl -sl
>Device:       1024-blocks    
>Used:
>/dev/md1          30720  
>       0
>/dev/md2          30720  
>       0
>/dev/ad0s1b      299848      
>   0
>Total:           361288
>        0
>
>Mne kazetca eto ne sovsem vernim povedenijem.Hotja vozmozno ja 4to-to nepravilno ponal
>
>v nastroikah, odnako dobitca togo, 4tobi "uborka" swap particij proishodila s ispolzovanijem
>
>originalnih sredstv mne ne udalos. Posemu ja vnes nebol6ije izmenenija v start/stop
>skripti.
>Hotel bi usli6at mnenije nadora po etomu povodu.
>
>freebsd53_2# cat /root/addswap.patch
>--- addswap     Sat Nov  27 23:31:00 2004
>
>***************
>*** 14,20 ****
>
>  name="addswap"
>  start_cmd="addswap_start"
>! stop_cmd=":"
>
>  addswap_start()
>  {
>--- 14,20 ----
>
>  name="addswap"
>  start_cmd="addswap_start"
>! stop_cmd="addswap_stop"
>
>  addswap_start()
>  {
>*************** addswap_start()
>*** 26,31 ****
>--- 26,48 ----
>            
>          
> echo "Adding ${swapfile} as additional swap"
>            
>          
> mdev=`mdconfig -a -t vnode -f ${swapfile}` && swapon /dev/${mdev}
>            
>    fi
>+            
>   ;;
>+       esac
>+ }
>+
>+
>+ addswap_stop()
>+ {
>+       case ${swapfile} in
>+       [Nn][Oo] | '')
>+            
>   ;;
>+       *)
>+            
>   for i in `swapctl -l | grep '^/dev/md[0-9]*'
>| cut -d ' ' -f 1 -`; do
>+            
>          
>echo "Removing ${swapfile} as additional swap"
>+            
>          
>swapoff ${i}
>+            
>          
>unit=`echo ${i} | sed 's/\/dev\/md//'`
>+            
>          
>mdconfig -d -u ${unit}
>+            
>   done
>            
>    ;;
>        esac
>  }
>freebsd53_2# cat /root/swap1.patch
>--- /etc/rc.d/swap1     Sat Nov 27 23:33:17 2004
>***************
>*** 13,19 ****
>  name="swap1"
>  stop_precmd='checkyesno swapoff || [ -n "$rc_force" ]'
>  start_cmd='swapon -a'
>! stop_cmd='swapoff -a'
>
>  load_rc_config swap
>  run_rc_command "$1"
>--- 13,27 ----
>  name="swap1"
>  stop_precmd='checkyesno swapoff || [ -n "$rc_force" ]'
>  start_cmd='swapon -a'
>! stop_cmd='swap1_stop'
>!
>! swap1_stop()
>! {
>!
>!       swapoff -a
>!       /etc/rc.d/addswap stop
>!
>! }
>
>  load_rc_config swap
>  run_rc_command "$1"
>freebsd53_2# chmod 755 addswap swap1
>freebsd53_2# patch < /root/addswap.patch
>Hmm...  Looks like a new-style context diff to me...
>The text leading up to this was:
>--------------------------
>|--- addswap    Sat Nov  27 23:31:00 2004
>--------------------------
>Patching file addswap using Plan A...
>Hunk #1 succeeded at 14.
>Hunk #2 succeeded at 26.
>done
>freebsd53_2# patch < /root/swap1.patch
>Hmm...  Looks like a new-style context diff to me...
>The text leading up to this was:
>--------------------------
>|--- /etc/rc.d/swap1    Sat Nov 27 23:33:17 2004
>--------------------------
>Patching file swap1 using Plan A...
>Hunk #1 succeeded at 13.
>done
>freebsd53_2# chmod 555 addswap swap1
>freebsd53_2# mv addswap.orig swap1.orig /root/
>freebsd53_2# ls -l addswap swap1
>-r-xr-xr-x  1 root  wheel  862 Sep  3 00:13
>addswap
>-r-xr-xr-x  1 root  wheel  432 Sep  3 00:13
>swap1
>
>Multiuser:
>freebsd53_2# swapctl -l
>Device:       1024-blocks    
>Used:
>/dev/ad0s1b      299848      
>   0
>/dev/md1          30720  
>       0
>
>Multiuser -> Single user:
># swapctl -l
>Device:       512-blocks    
> Used:
>
>Single user -> Multiuser:
>freebsd53_2# swapctl -sl
>Device:       1024-blocks    
>Used:
>/dev/ad0s1b      299848      
>   0
>/dev/md0          30720  
>       0
>Total:           330568
>        0
>
>
>P.S. Srazu izvinajus za translit.

так все дело в том что это BSD а не SYSV, загрузка в single-user mode
и переход в single-user mode НЕ РАВНЫ!
Поэтому и скрипт честно отрабатывает, потому как swap удаляется при
shutdown'е, а не при переходе в single-user mode (если я правильно
понял). Посмотри как init в БСДЯХ отрабатывает, возможно лучше rc.local
и rc.conf.local задействовать для проверки наличия swap? Посмотри для
этого init.

>>Situacija sleduju6aja:
>>
>>freebsd53_2# uname -r
>>5.3-RELEASE
>>freebsd53_2# cat /etc/rc.conf | grep swap
>>swapfile="/tmp/swap"            
>># Set to name of swapfile if aux swapfile desired.
>>swapoff="YES"           #
>>Remove swap partitions upon shutdown
>>
>>Tak vot pri perehode iz multiuser v single user rezim swap particii,
>>kotorije
>>bili dobavleni v sistemu ispolzuja swapfile zna4enije v /etc/rc.conf faile
>>ostajutca. Swap particii, kotorije registrirujutca v sisteme ispolzuja /etc/fstab
>>fail mozno ubrat pri prehode v single user rezim prisvoiv swapoff peremennoi
>>
>>zna4enije YES v faile /etc/rc.conf.
>>Pri obratnom perehode iz single user rezima v miltiuser rezim i pri
>>uslovii 4to
>>zna4enije swapfile ne ravno NO, v sisteme povtorno registrirjetca/dobavlajetca e6e
>>odna swap particija dla odnogo i togo-ze faila. V takom slu4aje summarnij
>>razmer sveh
>>swap particij v sisteme neveren da i kadznij raz ispolzujetca novoje md(4)
>>ustroistvo.
>>
>>Multiuser:
>>freebsd53_2# swapctl -l
>>Device:       1024-blocks    
>>Used:
>>/dev/ad0s1b      299848      
>>   0
>>/dev/md1          30720  
>>       0
>>
>>Multiuser -> Single user:
>># swapctl -l
>>Device:       512-blocks    
>> Used:
>>/dev/md1           61440
>>         0
>>
>>Single user -> Multiuser:
>>freebsd53_2# swapctl -sl
>>Device:       1024-blocks    
>>Used:
>>/dev/md1          30720  
>>       0
>>/dev/md2          30720  
>>       0
>>/dev/ad0s1b      299848      
>>   0
>>Total:           361288
>>        0
>>
>>Mne kazetca eto ne sovsem vernim povedenijem.Hotja vozmozno ja 4to-to nepravilno ponal
>>
>>v nastroikah, odnako dobitca togo, 4tobi "uborka" swap particij proishodila s ispolzovanijem
>>
>>originalnih sredstv mne ne udalos. Posemu ja vnes nebol6ije izmenenija v start/stop
>>skripti.
>>Hotel bi usli6at mnenije nadora po etomu povodu.
>>
>>freebsd53_2# cat /root/addswap.patch
>>--- addswap     Sat Nov  27 23:31:00 2004
>>
>>***************
>>*** 14,20 ****
>>
>>  name="addswap"
>>  start_cmd="addswap_start"
>>! stop_cmd=":"
>>
>>  addswap_start()
>>  {
>>--- 14,20 ----
>>
>>  name="addswap"
>>  start_cmd="addswap_start"
>>! stop_cmd="addswap_stop"
>>
>>  addswap_start()
>>  {
>>*************** addswap_start()
>>*** 26,31 ****
>>--- 26,48 ----
>>            
>>          
>> echo "Adding ${swapfile} as additional swap"
>>            
>>          
>> mdev=`mdconfig -a -t vnode -f ${swapfile}` && swapon /dev/${mdev}
>>            
>>    fi
>>+            
>>   ;;
>>+       esac
>>+ }
>>+
>>+
>>+ addswap_stop()
>>+ {
>>+       case ${swapfile} in
>>+       [Nn][Oo] | '')
>>+            
>>   ;;
>>+       *)
>>+            
>>   for i in `swapctl -l | grep '^/dev/md[0-9]*'
>>| cut -d ' ' -f 1 -`; do
>>+            
>>          
>>echo "Removing ${swapfile} as additional swap"
>>+            
>>          
>>swapoff ${i}
>>+            
>>          
>>unit=`echo ${i} | sed 's/\/dev\/md//'`
>>+            
>>          
>>mdconfig -d -u ${unit}
>>+            
>>   done
>>            
>>    ;;
>>        esac
>>  }
>>freebsd53_2# cat /root/swap1.patch
>>--- /etc/rc.d/swap1     Sat Nov 27 23:33:17 2004
>>***************
>>*** 13,19 ****
>>  name="swap1"
>>  stop_precmd='checkyesno swapoff || [ -n "$rc_force" ]'
>>  start_cmd='swapon -a'
>>! stop_cmd='swapoff -a'
>>
>>  load_rc_config swap
>>  run_rc_command "$1"
>>--- 13,27 ----
>>  name="swap1"
>>  stop_precmd='checkyesno swapoff || [ -n "$rc_force" ]'
>>  start_cmd='swapon -a'
>>! stop_cmd='swap1_stop'
>>!
>>! swap1_stop()
>>! {
>>!
>>!       swapoff -a
>>!       /etc/rc.d/addswap stop
>>!
>>! }
>>
>>  load_rc_config swap
>>  run_rc_command "$1"
>>freebsd53_2# chmod 755 addswap swap1
>>freebsd53_2# patch < /root/addswap.patch
>>Hmm...  Looks like a new-style context diff to me...
>>The text leading up to this was:
>>--------------------------
>>|--- addswap    Sat Nov  27 23:31:00 2004
>>--------------------------
>>Patching file addswap using Plan A...
>>Hunk #1 succeeded at 14.
>>Hunk #2 succeeded at 26.
>>done
>>freebsd53_2# patch < /root/swap1.patch
>>Hmm...  Looks like a new-style context diff to me...
>>The text leading up to this was:
>>--------------------------
>>|--- /etc/rc.d/swap1    Sat Nov 27 23:33:17 2004
>>--------------------------
>>Patching file swap1 using Plan A...
>>Hunk #1 succeeded at 13.
>>done
>>freebsd53_2# chmod 555 addswap swap1
>>freebsd53_2# mv addswap.orig swap1.orig /root/
>>freebsd53_2# ls -l addswap swap1
>>-r-xr-xr-x  1 root  wheel  862 Sep  3 00:13
>>addswap
>>-r-xr-xr-x  1 root  wheel  432 Sep  3 00:13
>>swap1
>>
>>Multiuser:
>>freebsd53_2# swapctl -l
>>Device:       1024-blocks    
>>Used:
>>/dev/ad0s1b      299848      
>>   0
>>/dev/md1          30720  
>>       0
>>
>>Multiuser -> Single user:
>># swapctl -l
>>Device:       512-blocks    
>> Used:
>>
>>Single user -> Multiuser:
>>freebsd53_2# swapctl -sl
>>Device:       1024-blocks    
>>Used:
>>/dev/ad0s1b      299848      
>>   0
>>/dev/md0          30720  
>>       0
>>Total:           330568
>>        0
>>
>>
>>P.S. Srazu izvinajus za translit.
>
>
>так все дело в том что это BSD а не SYSV, загрузка
>в single-user mode
>и переход в single-user mode НЕ РАВНЫ!
> Поэтому и скрипт честно отрабатывает, потому как swap удаляется при
>shutdown'е, а не при переходе в single-user mode (если я правильно
>понял). Посмотри как init в БСДЯХ отрабатывает, возможно лучше rc.local
>и rc.conf.local задействовать для проверки наличия swap? Посмотри для
>этого init.

Razli4ija BSD i SYSV eto ponatno. Onado neponatno drugoje:
1. Esli ispolzovat swapoff="YES" v /etc/rc.conf, togda pri perehode i single user swap particija 4estno "udalajetca", NO ostajutca swap
particii, kotorije bili dobalveni ispolzuja parametr swapfile="<file>"
v /etc/rc.conf ili ispolzuja dd->mdconfig->swapon podhod. Po mojemu
v slu4aje ispolzovanija swapoff="YES" dolzni udalatca vse swap particii
kotorije jest v sisteme
2. Pri obratnom perehode v multiuser i esli vistavle parametr swapfile
v sistemu vnov dobavlajetca mdx ustroistvo, kotoroje svazano s failom
i kotoroje registrirujetca kak swap file. V takom slu4aje jesli pri
perehode multiuser->Sinlgle user predidu6eje md ustroistvo ne ubirajetca
i pri perehode single->multiuser dobavlajetca e6e odno, pri4em oni oba
associirovani s odnim failom, to ob6ij razmer swap pamjati dostupnogo
sisteme neveren, ili po krainei mere on swapinfo pokavivajet ego neverno.