On 8/6/22 08:20, Jens Axboe wrote: > Avoid a kmalloc+kfree for each page array, if we only have a few pages > that are mapped. An alloc+free for each IO is quite expensive, and > it's pretty pointless if we're only dealing with 1 or a few vecs. > > Use UIO_FASTIOV like we do in other spots to set a sane limit for how > big of an IO we want to avoid allocations for. > > Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> > --- > block/blk-map.c | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > Looks good. Reviewed-by: Chaitanya Kulkarni <kch@xxxxxxxxxx> -ck
