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 Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ 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 -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html