Subj : [$] Parallel directory operations
To   : All
From : LWN.net
Date : Wed Apr 16 2025 18:15:07

[$] Parallel directory operations

Date:
Wed, 16 Apr 2025 17:09:52 +0000

Description:
Allowing directories to be modified in parallel was the topic of Jeff
Layton's filesystem-track session at the 2025 Linux Storage, Filesystem,
Memory Management, and BPF Summit (LSFMM+BPF).  There are certain use
cases, including for the NFS and Lustre filesystems, as mentioned in a patch 
set referenced in the topic
proposal , where contention in creating multiple files in a directory is
causing noticeable performance problems.  In some testing, Layton has found
that the inode read-write semaphore ( i_rwsem ) for the directory is
serializing operations; he wanted to discuss alternatives.

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Link to news story:
https://lwn.net/Articles/1017477/


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