diff options
Diffstat (limited to 'debian/patches-rt/0232-net-Another-local_irq_disable-kmalloc-headache.patch')
| -rw-r--r-- | debian/patches-rt/0232-net-Another-local_irq_disable-kmalloc-headache.patch | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/debian/patches-rt/0232-net-Another-local_irq_disable-kmalloc-headache.patch b/debian/patches-rt/0232-net-Another-local_irq_disable-kmalloc-headache.patch new file mode 100644 index 000000000..374593ebd --- /dev/null +++ b/debian/patches-rt/0232-net-Another-local_irq_disable-kmalloc-headache.patch @@ -0,0 +1,65 @@ +From b83d94e087c52b96575acd87c8ecaff00a418d02 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Wed, 26 Sep 2012 16:21:08 +0200 +Subject: [PATCH 232/347] net: Another local_irq_disable/kmalloc headache +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +Replace it by a local lock. Though that's pretty inefficient :( + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +--- + net/core/skbuff.c | 10 ++++++---- + 1 file changed, 6 insertions(+), 4 deletions(-) + +diff --git a/net/core/skbuff.c b/net/core/skbuff.c +index c623c129d0ab..0696d3cb809d 100644 +--- a/net/core/skbuff.c ++++ b/net/core/skbuff.c +@@ -63,6 +63,7 @@ + #include <linux/errqueue.h> + #include <linux/prefetch.h> + #include <linux/if_vlan.h> ++#include <linux/locallock.h> + + #include <net/protocol.h> + #include <net/dst.h> +@@ -330,6 +331,7 @@ struct napi_alloc_cache { + + static DEFINE_PER_CPU(struct page_frag_cache, netdev_alloc_cache); + static DEFINE_PER_CPU(struct napi_alloc_cache, napi_alloc_cache); ++static DEFINE_LOCAL_IRQ_LOCK(netdev_alloc_lock); + + static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) + { +@@ -337,10 +339,10 @@ static void *__netdev_alloc_frag(unsigned int fragsz, gfp_t gfp_mask) + unsigned long flags; + void *data; + +- local_irq_save(flags); ++ local_lock_irqsave(netdev_alloc_lock, flags); + nc = this_cpu_ptr(&netdev_alloc_cache); + data = page_frag_alloc(nc, fragsz, gfp_mask); +- local_irq_restore(flags); ++ local_unlock_irqrestore(netdev_alloc_lock, flags); + return data; + } + +@@ -416,13 +418,13 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, + if (sk_memalloc_socks()) + gfp_mask |= __GFP_MEMALLOC; + +- local_irq_save(flags); ++ local_lock_irqsave(netdev_alloc_lock, flags); + + nc = this_cpu_ptr(&netdev_alloc_cache); + data = page_frag_alloc(nc, len, gfp_mask); + pfmemalloc = nc->pfmemalloc; + +- local_irq_restore(flags); ++ local_unlock_irqrestore(netdev_alloc_lock, flags); + + if (unlikely(!data)) + return NULL; +-- +2.36.1 + |