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Pratik Rajesh Sampat
8b4f7e207c
Test allocation strategies of the file system and validate space anomalies as reported by the system versus the allocated by the program. The test is motivated by a bug in ext4 systems where-in ENOSPC is reported by the file system even though enough space for allocations is available[1]. [1]: https://patchwork.ozlabs.org/patch/1294003 Linux kernel patch series that fixes the above regression: 53f86b170dfa ("ext4: mballoc: add blocks to PA list under same spinlock after allocating blocks") cf5e2ca6c990 ("ext4: mballoc: refactor ext4_mb_discard_preallocations()") 07b5b8e1ac40 ("ext4: mballoc: introduce pcpu seqcnt for freeing PA to improve ENOSPC handling") 8ef123fe02ca ("ext4: mballoc: refactor ext4_mb_good_group()") 993778306e79 ("ext4: mballoc: use lock for checking free blocks while retrying") Suggested-by: Ritesh Harjani <riteshh@linux.ibm.com> Co-authored-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>