Commit e641c1e8 authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Stefan Hajnoczi
Browse files

cow: do not call bdrv_co_is_allocated 



As we change bdrv_is_allocated to gather more information from bs and
bs->file, it will become a bit slower.  It is still appropriate for online
jobs, but not for reads/writes.  Call the internal function instead.

Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 26ae9804

block/cow.c

+1 −1
Original line number Diff line number Diff line
@@ -212,7 +212,7 @@ static int coroutine_fn cow_read(BlockDriverState *bs, int64_t sector_num, 
    int ret, n;



    while (nb_sectors > 0) {

        if (bdrv_co_is_allocated(bs, sector_num, nb_sectors, &n)) {

        if (cow_co_is_allocated(bs, sector_num, nb_sectors, &n)) {

            ret = bdrv_pread(bs->file,

                        s->cow_sectors_offset + sector_num * 512,

                        buf, n * 512);