| commit | 5a1dad9d5a5777c4883de78d9f35bd8141175798 | |
| author | Nir Soffer <nirsof@gmail.com> | |
| Fri, 17 Feb 2017 00:51:26 +0000 (17 02:51 +0200) | ||
| committer | Kevin Wolf <kwolf@redhat.com> | |
| Fri, 24 Feb 2017 15:09:23 +0000 (24 16:09 +0100) | ||
| tree | a11964dfe24dbc4c7ef5fdc6c34abc4de325b187 | treesnapshot (tar.gz zip) |
| parent | 6f993f3fca4763a6b494ff587d4400b6e8a5ef31 | commitdiff |
qemu-img: Truncate before full preallocation
In a previous commit (qemu-img: Do not truncate before preallocation) we
moved truncate to the PREALLOC_MODE_OFF branch to avoid slowdown in
posix_fallocate().
However this change is not optimal when using PREALLOC_MODE_FULL, since
knowing the final size from the beginning could allow the file system
driver to do less allocations and possibly avoid fragmentation of the
file.
Now we truncate also before doing full preallocation.
Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In a previous commit (qemu-img: Do not truncate before preallocation) we
moved truncate to the PREALLOC_MODE_OFF branch to avoid slowdown in
posix_fallocate().
However this change is not optimal when using PREALLOC_MODE_FULL, since
knowing the final size from the beginning could allow the file system
driver to do less allocations and possibly avoid fragmentation of the
file.
Now we truncate also before doing full preallocation.
Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| block/file-posix.c | diffblobblamehistory |