Re: [PATCH 5/6] treewide: use kv[mz]alloc* rather than opencoded variants
From: Dilger, Andreas <hidden>
Date: 2017-01-13 01:11:56
Also in:
linux-mm, lkml
On Jan 12, 2017, at 08:37, Michal Hocko [off-list ref] wrote: From: Michal Hocko <mhocko@suse.com> There are many code paths opencoding kvmalloc. Let's use the helper instead. The main difference to kvmalloc is that those users are usually not considering all the aspects of the memory allocator. E.g. allocation requests < 64kB are basically never failing and invoke OOM killer to satisfy the allocation. This sounds too disruptive for something that has a reasonable fallback - the vmalloc. On the other hand those requests might fallback to vmalloc even when the memory allocator would succeed after several more reclaim/compaction attempts previously. There is no guarantee something like that happens though. This patch converts many of those places to kv[mz]alloc* helpers because they are more conservative. Signed-off-by: Michal Hocko <mhocko@suse.com>
Lustre part can be Acked-by: Andreas Dilger <redacted> [snip]
quoted hunk ↗ jump to hunk
diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c index a6a76a681ea9..8f638267e704 100644 --- a/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c +++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-mem.c@@ -45,15 +45,6 @@ EXPORT_SYMBOL(libcfs_kvzalloc);void *libcfs_kvzalloc_cpt(struct cfs_cpt_table *cptab, int cpt, size_t size, gfp_t flags) { - void *ret; - - ret = kzalloc_node(size, flags | __GFP_NOWARN, - cfs_cpt_spread_node(cptab, cpt)); - if (!ret) { - WARN_ON(!(flags & (__GFP_FS | __GFP_HIGH))); - ret = vmalloc_node(size, cfs_cpt_spread_node(cptab, cpt)); - } - - return ret; + return kvzalloc_node(size, flags, cfs_cpt_spread_node(cptab, cpt)); } EXPORT_SYMBOL(libcfs_kvzalloc_cpt);
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