diff --git a/util-linux-swapon-btrfs-limitations b/util-linux-swapon-btrfs-limitations new file mode 100644 index 0000000..59722da --- /dev/null +++ b/util-linux-swapon-btrfs-limitations @@ -0,0 +1,42 @@ +From: Jeff Mahoney +Subject: swapon: Document btrfs limitation with swapfiles +References: bnc#616617 + + Btrfs, as of 2.6.35, is unable to allow swapfiles to be used on its + filesystems. This is due to the swapfile implementation wanting to build + an extent map of each block in the file and expecting it to be static + for the life of the swapfile. + + Btrfs can't guarantee this and refuses to return the mapping. The swapfile + implementation just makes a comment about there being holes in the file - + but that's how btrfs denies the mapping. + + This patch adds a section to the swapon manpage to document it. + +Signed-off-by: Jeff Mahoney + +--- + mount/swapon.8 | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +--- a/mount/swapon.8 ++++ b/mount/swapon.8 +@@ -167,6 +167,18 @@ automatically detects and rewrites swap + suspend data (e.g S1SUSPEND, S2SUSPEND, ...). The problem is that if we don't + do it, then we get data corruption the next time an attempt at unsuspending is + made. ++.PP ++.B swapon ++may not work correctly when using a swap file with some versions of btrfs. ++This is due to the swap file implementation in the kernel expecting to be able ++to write to the file directly, without the assistance of the file system. ++Since btrfs is a copy-on-write file system, the file location may not be ++static and corruption can result. Btrfs actively disallows the use of files ++on its file systems by refusing to map the file. This can be seen in the system ++log as "swapon: swapfile has holes." One possible workaround is to map the ++file to a loopback device. This will allow the file system to determine the ++mapping properly but may come with a performance impact. ++ + .SH SEE ALSO + .BR swapon (2), + .BR swapoff (2), diff --git a/util-linux.changes b/util-linux.changes index 9732cbd..d84ec7b 100644 --- a/util-linux.changes +++ b/util-linux.changes @@ -1,3 +1,13 @@ +------------------------------------------------------------------- +Thu Jun 24 23:24:41 CEST 2010 - jeffm@suse.de + +- document btrfs limitation with swapfiles (bnc#616617) + +------------------------------------------------------------------- +Tue Jun 22 16:48:29 UTC 2010 - bg@novell.com + +- hppa specific binaries are parisc{,32,64} + ------------------------------------------------------------------- Tue Jun 1 14:23:23 UTC 2010 - puzel@novell.com diff --git a/util-linux.spec b/util-linux.spec index 1de8871..a18e67c 100644 --- a/util-linux.spec +++ b/util-linux.spec @@ -27,7 +27,7 @@ License: GPLv2+ Group: System/Base AutoReqProv: on Version: 2.17.2 -Release: 4 +Release: 5 Recommends: %name-lang = %{version} Summary: A collection of basic system utilities Source: ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/v%{version}/%name-ng-%{version}.tar.bz2 @@ -75,6 +75,7 @@ Patch4: util-linux-2.17.1-losetup-honor-documented-c-option Patch5: util-linux-addpart-use-atoll.patch # bnc#481123 Patch6: util-linux-mount-detect-ro-mount.patch +Patch7: util-linux-swapon-btrfs-limitations ## ## adjtimex ## @@ -165,6 +166,7 @@ unique IDs (UUIDs). %patch4 -p1 %patch5 -p1 %patch6 -p1 +%patch7 -p1 # cd adjtimex-* %patch50 -p1 @@ -349,10 +351,10 @@ rm -f $RPM_BUILD_ROOT%{_mandir}/man8/fdisk.8* %find_lang %{name}-ng %{name}.lang # create list of setarch(8) symlinks find $RPM_BUILD_ROOT%{_bindir}/ -regextype posix-egrep -type l \ - -regex ".*(linux32|linux64|s390|s390x|i386|ppc|ppc64|ppc32|sparc|sparc64|sparc32|sparc32bash|mips|mips64|mips32|ia64|x86_64)$" \ + -regex ".*(linux32|linux64|s390|s390x|i386|ppc|ppc64|ppc32|sparc|sparc64|sparc32|sparc32bash|mips|mips64|mips32|ia64|x86_64|parisc|parisc32|parisc64)$" \ -printf "%{_bindir}/%f\n" >> %{name}.files find $RPM_BUILD_ROOT%{_mandir}/man8 -regextype posix-egrep \ - -regex ".*(linux32|linux64|s390|s390x|i386|ppc|ppc64|ppc32|sparc|sparc64|sparc32|sparc32bash|mips|mips64|mips32|ia64|x86_64)\.8.*" \ + -regex ".*(linux32|linux64|s390|s390x|i386|ppc|ppc64|ppc32|sparc|sparc64|sparc32|sparc32bash|mips|mips64|mips32|ia64|x86_64|parisc|parisc32|parisc64)\.8.*" \ -printf "%{_mandir}/man8/%f*\n" >> %{name}.files %clean