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993778306e
linux/fs/ext4
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Ritesh Harjani 993778306e ext4: mballoc: use lock for checking free blocks while retrying 
Currently while doing block allocation grp->bb_free may be getting
modified if discard is happening in parallel.
For e.g. consider a case where there are lot of threads who have
preallocated lot of blocks and there is a thread which is trying
to discard all of this group's PA. Now it could happen that
we see all of those group's bb_free is zero and fail the allocation
while there is sufficient space if we free up all the PA.

So this patch adds another flag "EXT4_MB_STRICT_CHECK" which will be set
if we are unable to allocate any blocks in the first try (since we may
not have considered blocks about to be discarded from PA lists).
So during retry attempt to allocate blocks we will use ext4_lock_group()
for checking if the group is good or not.

Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/9cb740a117c958c36596f167b12af1beae9a68b7.1589955723.git.riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2020-06-03 23:16:53 -04:00
..
acl.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
acl.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
balloc.c ext4: balloc: use task_pid_nr() helper 2020-06-03 23:16:52 -04:00
bitmap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block_validity.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
dir.c ext4: use flexible-array member in struct fname 2020-03-14 14:43:13 -04:00
ext4_extents.h ext4: fix EXT_MAX_EXTENT/INDEX to check for zeroed eh_max 2020-06-03 23:16:49 -04:00
ext4_jbd2.c ext4: remove set but not used variable 'es' in ext4_jbd2.c 2020-04-15 23:58:49 -04:00
ext4_jbd2.h ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
ext4.h ext4: mballoc: use lock for checking free blocks while retrying 2020-06-03 23:16:53 -04:00
extents_status.c ext4: remove unnecessary comparisons to bool 2020-06-03 23:16:49 -04:00
extents_status.h ext4: fix extent_status trace points 2020-01-25 02:03:03 -05:00
extents.c ext4: rework map struct instantiation in ext4_ext_map_blocks() 2020-06-03 23:16:53 -04:00
file.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
fsmap.c ext4: fix miscellaneous sparse warnings 2019-05-12 04:49:47 -04:00
fsmap.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
fsync.c ext4: fix race between ext4_sync_parent() and rename() 2020-06-03 23:16:51 -04:00
hash.c ext4: fix kernel oops caused by spurious casefold flag 2019-09-03 01:43:17 -04:00
ialloc.c ext4: fix buffer_head refcnt leak when ext4_iget() fails 2020-06-03 23:16:49 -04:00
indirect.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
inline.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
inode-test.c kunit: allow kunit tests to be loaded as a module 2020-01-09 16:42:29 -07:00
inode.c ext4: make ext_debug() implementation to use pr_debug() 2020-06-03 23:16:52 -04:00
ioctl.c 1) Replace ext4's bmap and iopoll implementations to use iomap. 2020-04-05 10:54:03 -07:00
Kconfig ext4: make ext_debug() implementation to use pr_debug() 2020-06-03 23:16:52 -04:00
Makefile kunit: allow kunit tests to be loaded as a module 2020-01-09 16:42:29 -07:00
mballoc.c ext4: mballoc: use lock for checking free blocks while retrying 2020-06-03 23:16:53 -04:00
mballoc.h ext4: mballoc: make mb_debug() implementation to use pr_debug() 2020-06-03 23:16:52 -04:00
migrate.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
mmp.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
move_extent.c ext4: save all error info in save_error_info() and drop ext4_set_errno() 2020-04-01 17:29:06 -04:00
namei.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
page-io.c fs/buffer: Make BH_Uptodate_Lock bit_spin_lock a regular spinlock_t 2020-03-28 13:21:08 +01:00
readpage.c ext4: remove unneeded check for error allocating bio_post_read_ctx 2020-01-17 16:24:54 -05:00
resize.c ext4: fix potential race between s_flex_groups online resizing and access 2020-02-21 19:31:46 -05:00
super.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
symlink.c ext4: switch to fscrypt_get_symlink() 2018-01-11 22:10:40 -05:00
sysfs.c block: move the part_stat* helpers from genhd.h to a new header 2020-03-25 09:50:09 -06:00
truncate.h ext4: handle layout changes to pinned DAX mappings 2018-07-29 17:00:22 -04:00
verity.c fs-verity: implement readahead of Merkle tree pages 2020-01-14 13:27:32 -08:00
xattr_security.c ext4: use XATTR_CREATE in ext4_initxattrs() 2018-05-10 11:52:14 -04:00
xattr_trusted.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr.c ext4: handle ext4_mark_inode_dirty errors 2020-06-03 23:16:50 -04:00
xattr.h ext4: use flexible-array member for xattr structs 2020-03-14 14:43:13 -04:00