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mzap_upgrade() must use kmem_alloc()

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These allocations in mzap_update() used to be kmem_alloc() but
were changed to vmem_alloc() due to the size of the allocation.
However, since it turns out this function may be called in the
context of the txg_sync thread they must be changed back to use
a kmem_alloc() to ensure the KM_PUSHPAGE flag is honored.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf 2012-08-21 20:53:01 -07:00
parent 8630650a8d
commit 991fc1d7ae
1 changed files with 3 additions and 3 deletions
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6
module/zfs/zap_micro.c
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@ -533,7 +533,7 @@ mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags)
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
sz = zap->zap_dbuf->db_size;
mzp = vmem_alloc(sz, KM_SLEEP);
mzp = kmem_alloc(sz, KM_PUSHPAGE | KM_NODEBUG);
bcopy(zap->zap_dbuf->db_data, mzp, sz);
nchunks = zap->zap_m.zap_num_chunks;
@ -541,7 +541,7 @@ mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags)
err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object,
1ULL << fzap_default_block_shift, 0, tx);
if (err) {
vmem_free(mzp, sz);
kmem_free(mzp, sz);
return (err);
}
}
@ -567,7 +567,7 @@ mzap_upgrade(zap_t **zapp, dmu_tx_t *tx, zap_flags_t flags)
if (err)
break;
}
vmem_free(mzp, sz);
kmem_free(mzp, sz);
*zapp = zap;
return (err);
}