BIO_ALLOC_BIOSET(9) The Linux VFS BIO_ALLOC_BIOSET(9)NAMEbio_alloc_bioset - allocate a bio for I/O
SYNOPSIS
struct bio * bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs,
struct bio_set * bs);
ARGUMENTS
gfp_mask
the GFP_ mask given to the slab allocator
nr_iovecs
number of iovecs to pre-allocate
bs
the bio_set to allocate from. If NULL, just use kmalloc
DESCRIPTIONbio_alloc_bioset will first try its own mempool to satisfy the
allocation. If __GFP_WAIT is set then we will block on the internal
pool waiting for a struct bio to become free. If a NULL bs is passed
in, we will fall back to just using kmalloc to allocate the required
memory.
Note that the caller must set ->bi_destructor on succesful return of a
bio, to do the appropriate freeing of the bio once the reference count
drops to zero.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 BIO_ALLOC_BIOSET(9)