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Switch to using configure --with-default-data-alignment=<NUM> to

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establish DEFAULT_DATA_ALIGNMENT.  Again, 0=64KiB, 1=1MiB, 2=2MiB

Default is 1.
This commit is contained in:
Mike Snitzer 2010-08-20 22:24:58 +00:00
parent 4efb1d9cbb
commit 7063efe1bd
3 changed files with 11 additions and 2 deletions
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10
configure.in
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@ -1184,6 +1184,15 @@ AC_ARG_WITH(default-locking-dir,
AC_DEFINE_UNQUOTED(DEFAULT_LOCK_DIR, ["$DEFAULT_LOCK_DIR"],
[Name of default locking directory.])
################################################################################
dnl -- Setup default data alignment
AC_ARG_WITH(default-data-alignment,
AC_HELP_STRING([--with-default-data-alignment=NUM],
[set the default data alignment in MiB [[1]]]),
DEFAULT_DATA_ALIGNMENT=$withval, DEFAULT_DATA_ALIGNMENT=1)
AC_DEFINE_UNQUOTED(DEFAULT_DATA_ALIGNMENT, [$DEFAULT_DATA_ALIGNMENT],
[Default data alignment.])
################################################################################
dnl -- which kernel interface to use (ioctl only)
AC_MSG_CHECKING(for kernel interface choice)
@ -1244,6 +1253,7 @@ AC_SUBST(DEFAULT_SYS_DIR)
AC_SUBST(DEFAULT_ARCHIVE_SUBDIR)
AC_SUBST(DEFAULT_BACKUP_SUBDIR)
AC_SUBST(DEFAULT_CACHE_SUBDIR)
AC_SUBST(DEFAULT_DATA_ALIGNMENT)
AC_SUBST(DEFAULT_LOCK_DIR)
AC_SUBST(DEFAULT_RUN_DIR)
AC_SUBST(DEVMAPPER)

2
doc/example.conf.in
View File

@ -101,7 +101,7 @@ devices {
# Default alignment of the start of a data area in MB. If set to 0,
# a small value of 64KB will be used, which was the default until
# LVM2 version 2.02.73. Set to 1 for 1MiB, 2 for 2MiB, etc.
default_data_alignment = 1
# default_data_alignment = @DEFAULT_DATA_ALIGNMENT@
# By default, the start of a PV's data area will be a multiple of
# the 'minimum_io_size' or 'optimal_io_size' exposed in sysfs.

1
lib/config/defaults.h
View File

@ -34,7 +34,6 @@
#define DEFAULT_MD_CHUNK_ALIGNMENT 1
#define DEFAULT_IGNORE_SUSPENDED_DEVICES 1
#define DEFAULT_REQUIRE_RESTOREFILE_WITH_UUID 1
#define DEFAULT_DATA_ALIGNMENT 1
#define DEFAULT_DATA_ALIGNMENT_OFFSET_DETECTION 1
#define DEFAULT_DATA_ALIGNMENT_DETECTION 1