Hi,
I found when we exhaust memory, tmpfs will not be able to write
anything into it and cannot mount it.
I use ZFS and TMPFS at the same time.
Florence# cd /usr/src && make buildworld > /dev/null &
Florence# uname -a
FreeBSD Florence.tamama.org 7.0-RELEASE-p1 FreeBSD 7.0-RELEASE-p1 #5:
Mon May 5 00:36:32 CST 2008
root@Florence.tamama.org:/usr/obj/usr/src/sys/KERNEL amd64
Florence# mount -t tmpfs -o rw,size=1024000 tmpfs /tmp/tmpfs
mount: tmpfs : No space left on device
first 5 lines of top:
last pid: 26893; load averages: 1.50, 1.58, 1.48
up 12+01:43:49 05:40:51
146 processes: 2 running, 144 sleeping
CPU states: % user, % nice, % system, % interrupt, % idle
Mem: 406M Active, 574M Inact, 1775M Wired, 83M Cache, 214M Buf, 126M Free
Swap: 1024M Total, 1024M Free
I think there should be a "lower bound" size limit. Does TMPFS use
kernel-space memory?
Hi, I found when we exhaust memory, tmpfs will not be able to write anything into it and cannot mount it. I use ZFS and TMPFS at the same time. Florence# cd /usr/src && make buildworld > /dev/null & Florence# uname -a FreeBSD Florence.tamama.org 7.0-RELEASE-p1 FreeBSD 7.0-RELEASE-p1 #5: Mon May 5 00:36:32 CST 2008 root@Florence.tamama.org:/usr/obj/usr/src/sys/KERNEL amd64 Florence# mount -t tmpfs -o rw,size=1024000 tmpfs /tmp/tmpfs mount: tmpfs : No space left on device first 5 lines of top: last pid: 26893; load averages: 1.50, 1.58, 1.48 up 12+01:43:49 05:40:51 146 processes: 2 running, 144 sleeping CPU states: % user, % nice, % system, % interrupt, % idle Mem: 406M Active, 574M Inact, 1775M Wired, 83M Cache, 214M Buf, 126M Free Swap: 1024M Total, 1024M Free I think there should be a "lower bound" size limit. Does TMPFS use kernel-space memory?
Lin Jui-Nan Eric wrote:> I think there should be a "lower bound" size limit. Does TMPFS use > kernel-space memory?Yes, tmpfs does use kmem and competes with ZFS. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: OpenPGP digital signature Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20080609/5d7ed020/signature.pgp
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ivan Voras wrote: | Lin Jui-Nan Eric wrote: | |> I think there should be a "lower bound" size limit. Does TMPFS use |> kernel-space memory? | | Yes, tmpfs does use kmem and competes with ZFS. Yes and no. tmpfs makes use of some kernel memory but most of data is stored in swappable memory. Cheers, - -- Xin LI <delphij@delphij.net> http://www.delphij.net/ FreeBSD - The Power to Serve! -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkhkNfsACgkQi+vbBBjt66Ad8ACfYD1Yq09oY7iIjxq353iMFKKp FGYAnjA3I8V2cN1s1EW2NuwfhilaJBMe =vnM3 -----END PGP SIGNATURE-----