diff options
| author | Shanker Donthineni <sdonthineni@nvidia.com> | 2023-05-19 08:49:00 -0500 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-05-24 11:39:44 +0200 |
| commit | bc06a9e0874239cb6d4eebcb0ecd1a91ad9272db (patch) | |
| tree | 219f3876ab774118e3cad8937392d9e4f6a812ff /include/linux/irqdesc.h | |
| parent | d15121be7485655129101f3960ae6add40204463 (diff) | |
genirq: Use hlist for managing resend handlers
The current implementation utilizes a bitmap for managing interrupt resend
handlers, which is allocated based on the SPARSE_IRQ/NR_IRQS macros.
However, this method may not efficiently utilize memory during runtime,
particularly when IRQ_BITMAP_BITS is large.
Address this issue by using an hlist to manage interrupt resend handlers
instead of relying on a static bitmap memory allocation. Additionally, a
new function, clear_irq_resend(), is introduced and called from
irq_shutdown to ensure a graceful teardown of the interrupt.
Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230519134902.1495562-2-sdonthineni@nvidia.com
Diffstat (limited to 'include/linux/irqdesc.h')
| -rw-r--r-- | include/linux/irqdesc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index 844a8e30e6de..d9451d456a73 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -102,6 +102,9 @@ struct irq_desc { int parent_irq; struct module *owner; const char *name; +#ifdef CONFIG_HARDIRQS_SW_RESEND + struct hlist_node resend_node; +#endif } ____cacheline_internodealigned_in_smp; #ifdef CONFIG_SPARSE_IRQ |