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Fix memory allocation issue for BLAKE3 context

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The kmem_alloc(sizeof (*ctx), KM_NOSLEEP) call on FreeBSD can't be
used in this code segment. Work around this by pre-allocating a percpu
context array for later use.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes #13568
This commit is contained in:
Tino Reichardt
2022-06-21 23:32:09 +02:00
committed by GitHub
parent b17663f571
commit deb1213098
4 changed files with 48 additions and 4 deletions
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module/icp/algs/blake3/blake3_impl.c
+28
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@@ -201,6 +201,34 @@ blake3_impl_get_ops(void)
return (blake3_selected_impl);
}
#if defined(_KERNEL)
void **blake3_per_cpu_ctx;
void
blake3_per_cpu_ctx_init(void)
{
/*
* Create "The Godfather" ptr to hold all blake3 ctx
*/
blake3_per_cpu_ctx = kmem_alloc(max_ncpus * sizeof (void *), KM_SLEEP);
for (int i = 0; i < max_ncpus; i++) {
blake3_per_cpu_ctx[i] = kmem_alloc(sizeof (BLAKE3_CTX),
KM_SLEEP);
}
}
void
blake3_per_cpu_ctx_fini(void)
{
for (int i = 0; i < max_ncpus; i++) {
memset(blake3_per_cpu_ctx[i], 0, sizeof (BLAKE3_CTX));
kmem_free(blake3_per_cpu_ctx[i], sizeof (BLAKE3_CTX));
}
memset(blake3_per_cpu_ctx, 0, max_ncpus * sizeof (void *));
kmem_free(blake3_per_cpu_ctx, max_ncpus * sizeof (void *));
}
#endif
#if defined(_KERNEL) && defined(__linux__)
static int
icp_blake3_impl_set(const char *name, zfs_kernel_param_t *kp)