The patch titled
mm: vmalloc use mutex for purge
has been added to the -mm tree. Its filename is
mm-vmalloc-use-mutex-for-purge.patch
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------------------------------------------------------
Subject: mm: vmalloc use mutex for purge
From: Nick Piggin <npiggin@xxxxxxx>
The vmalloc purge lock can be a mutex so we can sleep while a purge is
going on (purge involves a global kernel TLB invalidate, so it can take
quite a while).
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff -puN mm/vmalloc.c~mm-vmalloc-use-mutex-for-purge mm/vmalloc.c
--- a/mm/vmalloc.c~mm-vmalloc-use-mutex-for-purge
+++ a/mm/vmalloc.c
@@ -14,6 +14,7 @@
#include <linux/highmem.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
@@ -473,7 +474,7 @@ static atomic_t vmap_lazy_nr = ATOMIC_IN
static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
int sync, int force_flush)
{
- static DEFINE_SPINLOCK(purge_lock);
+ static DEFINE_MUTEX(purge_lock);
LIST_HEAD(valist);
struct vmap_area *va;
int nr = 0;
@@ -484,10 +485,10 @@ static void __purge_vmap_area_lazy(unsig
* the case that isn't actually used at the moment anyway.
*/
if (!sync && !force_flush) {
- if (!spin_trylock(&purge_lock))
+ if (!mutex_trylock(&purge_lock))
return;
} else
- spin_lock(&purge_lock);
+ mutex_lock(&purge_lock);
rcu_read_lock();
list_for_each_entry_rcu(va, &vmap_area_list, list) {
@@ -519,7 +520,7 @@ static void __purge_vmap_area_lazy(unsig
__free_vmap_area(va);
spin_unlock(&vmap_area_lock);
}
- spin_unlock(&purge_lock);
+ mutex_unlock(&purge_lock);
}
/*
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
linux-next.patch
mm-vmalloc-allocator-off-by-one.patch
mm-vmalloc-failure-flush-fix.patch
mm-vmalloc-search-restart-fix.patch
mm-dont-mark_page_accessed-in-fault-path.patch
mm-invoke-oom-killer-from-page-fault.patch
mm-invoke-oom-killer-from-page-fault-fix.patch
mm-invoke-oom-killer-from-page-fault-fix-fix-2.patch
mm-write_cache_pages-cyclic-fix.patch
mm-write_cache_pages-cyclic-fix-fix.patch
mm-write_cache_pages-early-loop-termination.patch
mm-write_cache_pages-writepage-error-fix.patch
mm-write_cache_pages-integrity-fix.patch
mm-write_cache_pages-cleanups.patch
mm-write_cache_pages-optimise-page-cleaning.patch
mm-write_cache_pages-terminate-quickly.patch
mm-write_cache_pages-more-terminate-quickly.patch
mm-do_sync_mapping_range-integrity-fix.patch
mm-get-rid-of-pagevec_release_nonlru.patch
mm-more-likely-reclaim-madv_sequential-mappings.patch
mm-vmalloc-tweak-failure-printk.patch
mm-vmalloc-improve-vmallocinfo.patch
mm-vmalloc-use-mutex-for-purge.patch
mm-vmalloc-make-lazy-unmapping-configurable.patch
reiser4.patch
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