Re: [LTP] [PATCH] inode01: Increase dev_min_size to prevent ENOSPC on exfat

[Avinesh Kumar via ltp <ltp@lists.linux.it>]

Hi,

This issue is alreday being discussed in this PR:
https://github.com/linux-test-project/ltp/pull/1340

Thanks,
Avinesh

On 8/24/26 10:56 AM, Wake Liu wrote:
> The parallel scenario concurrently spawns multiple workers (default 5),
> each creating 2,185 files and directories, totaling 10,925 objects.
> 
> On exfat, each file and directory occupies at least one cluster (default
> 32 KB for volumes > 256 MB), which requires ~350 MB of data clusters.
> With filesystem metadata (FAT, allocation bitmap, upcase table),
> directory growth, boundary alignment, and multi-worker concurrent
> allocation fragmentation, the current 512 MB device size is easily
> exhausted, leading to ENOSPC failures during write() or mkdir():
> 
>    inode01.c:61: TBROK: write(3,...) failed: ENOSPC (28)
>    inode01.c:64: TBROK: mkdir(...) failed: ENOSPC (28)
> 
> Increase dev_min_size to 1024 MB to provide sufficient headroom for the
> parallel scenario on exfat.
> 
> Fixes: ecf418722780 ("inode01: increase dev_min_size to fit the peak usage in parallel scenario")
> Signed-off-by: Wake Liu <wakel@google.com>
> ---
>   testcases/kernel/fs/inode/inode01.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/testcases/kernel/fs/inode/inode01.c b/testcases/kernel/fs/inode/inode01.c
> index d41ff2c62..87ee07612 100644
> --- a/testcases/kernel/fs/inode/inode01.c
> +++ b/testcases/kernel/fs/inode/inode01.c
> @@ -68,7 +68,7 @@ static void create_tree(const struct tcase *tc, const char *parent,
>   }
>   
>   static void record_inode(struct inode_info *inodes, unsigned int idx,
> -			 const char *path, ino_t ino)
> +			 const char *path, uint64_t ino)
>   {
>   	inodes[idx].ino = ino;
>   	snprintf(inodes[idx].path, sizeof(inodes[idx].path), "%s", path);
> @@ -256,7 +256,7 @@ static struct tst_test test = {
>   	.mount_device = 1,
>   	.all_filesystems = 1,
>   	.needs_root = 1,
> -	.dev_min_size = 512,
> +	.dev_min_size = 1024,
>   	.forks_child = 1,
>   	.needs_checkpoints = 1,
>   	.timeout = 300,


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