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| author | Richard Jones <rjones@redhat.com> | 2010-02-09 18:00:24 +0000 |
|---|---|---|
| committer | Richard Jones <rjones@redhat.com> | 2010-02-10 10:46:23 +0000 |
| commit | f93cbe5756cf052cce8049087afdcf714a3fc70c (patch) | |
| tree | c8caeeeb48f4293aa3aa7781fa3ae013b146728a /perl/lib/Sys | |
| parent | 245ac5673700f54479e9408e8659cb68f80c344a (diff) | |
| download | libguestfs-f93cbe5756cf052cce8049087afdcf714a3fc70c.tar.gz libguestfs-f93cbe5756cf052cce8049087afdcf714a3fc70c.tar.xz libguestfs-f93cbe5756cf052cce8049087afdcf714a3fc70c.zip | |
Use mount-options instead of mount to avoid implicit -o sync.
guestfs_mount adds -o sync implicitly. This causes a very large
performance problem for write-intensive programs (eg. virt-v2v).
Document this as a "gotcha".
Change the tests, guestfish, Sys::Guestfs::Lib, guestmount to use
mount-options instead.
(Note that this gotcha does not affect mount-ro).
The source of the performance problem was first identified by
Matthew Booth.
Diffstat (limited to 'perl/lib/Sys')
| -rw-r--r-- | perl/lib/Sys/Guestfs/Lib.pm | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/perl/lib/Sys/Guestfs/Lib.pm b/perl/lib/Sys/Guestfs/Lib.pm index 49c08b39..21c9a64c 100644 --- a/perl/lib/Sys/Guestfs/Lib.pm +++ b/perl/lib/Sys/Guestfs/Lib.pm @@ -1282,7 +1282,7 @@ sub mount_operating_system if($ro) { $g->mount_ro ($mounts->{$_}, $_) } else { - $g->mount ($mounts->{$_}, $_) + $g->mount_options ("", $mounts->{$_}, $_) } } } |