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LU-477 ldiskfs: allocate s_group_desc/s_group_info by vmalloc()
Add the patch to the RHEL6 ldiskfs patch series.
Large kmalloc() for sbi->s_group_desc and sbi->s_group_info can fail
for large filesystems (typically over 16TB), which will cause the
"not enough memory" error while mounting. This patch makes allocation
fall back to vmalloc() if the kmalloc() failed, as what was done for
sbi->s_flex_groups.
To avoid colliding with an valid on-disk inode number, EXT4_BAD_INO
is used as the number of the buddy cache inode.
The patch also incorporates the following upstream kernel fix:
commit 32a9bb57d7c1fd04ae0f72b8f671501f000a0e9f
ext4: fix missing iput() of root inode for some mount error paths
https://bugzilla.kernel.org/show_bug.cgi?id=26752
Signed-off-by: Yu Jian <yujian whamcloud.com>
Change-Id: I3950425835ea7f2968ceb2edbc622e3ff3ed8545
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LU-723 build: Enhance lustre/ldiskfs build system Enhance the lustre/ldiskfs build system so it is more robust, flexible, and consistent with lustre/zfs build system. This change is being made in the interest of standardizing the infra-structure around backend filesystems. This change does not effect the current behavior of the --with-ldiskfs, --enable-ext4, or --with-ldiskfsprogs configure options. However, it does remove the obsolete --with-ldiskfs-inkernel configure option which was only used by LLNL. It also adds the --with-ldiskfs-obj configure option which improves flexibility. And the --enable-ldiskfs-build configure option to support building against the lustre-ldiskfs-devel package. The behavior of these options is consistent with their ZFS counterparts, see commit 8c7266c for further details. --enable-ext4 enable ldiskfs build using ext4 --enable-ldiskfs-build enable ldiskfs configure/make --with-ldiskfs=path set path to ldiskfs source --with-ldiskfs-obj=path set path to ldiskfs objects --with-ldiskfsprogs use alternate names for ldiskfs-enabled e2fsprogs Sample ./configure results when building lustre and ldiskfs using the kernel-devel and kernel-debuginfo-common packages. checking whether to enable ldiskfs... yes checking ldiskfs source directory... /home/behlendo/src/git/lustre/ldiskfs checking ldiskfs object directory... /home/behlendo/src/git/lustre/ldiskfs checking ldiskfs module symbols... Module.symvers checking ldiskfs source release... 3.3.0 checking whether to use ext3 or ext4 source... ext4 checking ext4 source directory... /usr/src/debug/.../fs/ext4 checking whether to build ldiskfs... yes checking for /home/behlendo/src/git/lustre/ldiskfs/configure... yes checking for /usr/src/debug/.../fs/ext4/dir.c... yes checking for /usr/src/debug/.../fs/ext4/file.c... yes checking for /usr/src/debug/.../fs/ext4/inode.c... yes checking for /usr/src/debug/.../fs/ext4/super.c... yes checking if ext4_ext_walk_space() takes i_data_sem... yes checking if LDISKFS_SINGLEDATA_TRANS_BLOCKS takes sb as argument... yes checking if ldiskfs_discard_preallocations defined... yes checking if ldiskfs_ext_insert_extent needs 5 arguments... yes In the context of this change additional cleanup has been done and all of the ldiskfs specific code relocated to lustre-build-ldiskfs.m4. Note that this change moves us closer to supporting patchless Lustre servers with ldiskfs. Once the remaining kernel patches for Lustre are dropped you will be able to build Lustre using the distribution provided kernel-devel and kernel-debuginfo-common packages. This change also incorperates ORI-340, commit f604951, which ensures that the Module.symvers file will cleanly include the symbols for all enabled Lustre backends. While the only backend supported by master right now is ldiskfs this brings the master and orion branchs in to sync in this regard. Change-Id: I6f13f266944ec6967f4d7705a30b83ab8e577b15 Signed-off-by: Brian Behlendorf <behlendorf1 llnl.gov> Signed-off-by: Prakash Surya <surya1 llnl.gov> |
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