Searched hist:"2 c869b262a10ca99cb866d04087d75311587a30c" (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/fs/ext4/ |
| H A D | resize.c | diff 2c869b262a10ca99cb866d04087d75311587a30c Sat May 02 22:58:32 CDT 2015 Jan Kara <jack@suse.cz> ext4: fix growing of tiny filesystems
The estimate of necessary transaction credits in ext4_flex_group_add()
is too pessimistic. It reserves credit for sb, resize inode, and resize
inode dindirect block for each group added in a flex group although they
are always the same block and thus it is enough to account them only
once. Also the number of modified GDT block is overestimated since we
fit EXT4_DESC_PER_BLOCK(sb) descriptors in one block.
Make the estimation more precise. That reduces number of requested
credits enough that we can grow 20 MB filesystem (which has 1 MB
journal, 79 reserved GDT blocks, and flex group size 16 by default).
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
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| /openbmc/linux/fs/jbd2/ |
| H A D | transaction.c | diff 6d3ec14d703c660c4baf8d726538b5415e23b4fb Tue Aug 04 10:21:52 CDT 2015 Lukas Czerner <lczerner@redhat.com> jbd2: limit number of reserved credits
Currently there is no limitation on number of reserved credits we can
ask for. If we ask for more reserved credits than 1/2 of maximum
transaction size, or if total number of credits exceeds the maximum
transaction size per operation (which is currently only possible with
the former) we will spin forever in start_this_handle().
Fix this by adding this limitation at the start of start_this_handle().
This patch also removes the credit limitation 1/2 of maximum transaction
size, since we really only want to limit the number of reserved credits.
There is not much point to limit the credits if there is still space in
the journal.
This accidentally also fixes the online resize, where due to the
limitation of the journal credits we're unable to grow file systems with
1k block size and size between 16M and 32M. It has been partially fixed
by 2c869b262a10ca99cb866d04087d75311587a30c, but not entirely.
Thanks Jan Kara for helping me getting the correct fix.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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