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Make spl_kmem_cache size check consistent
On Linux x86_64, kmem cache can have size up to 4M, however increasing spl_kmem_cache_slab_limit can lead to crash due to the size check inconsistency. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Youzhong Yang <yyang@mathworks.com> Closes #15757
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@ -91,7 +91,8 @@ MODULE_PARM_DESC(spl_kmem_cache_max_size, "Maximum size of slab in MB");
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* of 16K was determined to be optimal for architectures using 4K pages and
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* to also work well on architecutres using larger 64K page sizes.
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*/
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static unsigned int spl_kmem_cache_slab_limit = 16384;
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static unsigned int spl_kmem_cache_slab_limit =
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SPL_MAX_KMEM_ORDER_NR_PAGES * PAGE_SIZE;
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module_param(spl_kmem_cache_slab_limit, uint, 0644);
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MODULE_PARM_DESC(spl_kmem_cache_slab_limit,
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"Objects less than N bytes use the Linux slab");
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@ -783,7 +784,7 @@ spl_kmem_cache_create(const char *name, size_t size, size_t align,
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} else {
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unsigned long slabflags = 0;
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if (size > (SPL_MAX_KMEM_ORDER_NR_PAGES * PAGE_SIZE))
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if (size > spl_kmem_cache_slab_limit)
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goto out;
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#if defined(SLAB_USERCOPY)
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