https://bugzilla.kernel.org/show_bug.cgi?id=208805 Bug ID: 208805 Summary: XFS: iozone possible memory allocation deadlock Product: File System Version: 2.5 Kernel Version: Linux 5.4 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: XFS Assignee: filesystem_xfs@xxxxxxxxxxxxxxxxxxxxxx Reporter: jjzuming@xxxxxxxxxxx Regression: No When I ran iozone to test XFS in a memory insufficient situation，I found that iozone was blocked and The log "XFS: iozone possible memory allocation deadlock" was printed. Reviewing the XFS code, I found that kmem_alloc(), xfs_buf_allocate_memory(), kmem_zone_alloc() and kmem_realloc() were implemented with "while" loops. These functions kept trying to get memory while the memory was insufficient, as a result of which "memory allocation deadlock" happened. I think it may be a little unreasonable, although it can guarantee that the memory allocation succeed. Maybe using error handling code to handle the memory allocation failures is better. -- You are receiving this mail because: You are watching the assignee of the bug.
