diff options
Diffstat (limited to 'drivers/scsi/sd.c')
| -rw-r--r-- | drivers/scsi/sd.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 4a57ffecc7e6..5c9acb634ff7 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -132,6 +132,7 @@ static DEFINE_MUTEX(sd_ref_mutex); static struct kmem_cache *sd_cdb_cache; static mempool_t *sd_cdb_pool; +static mempool_t *sd_page_pool; static const char *sd_cache_types[] = { "write through", "none", "write back", @@ -758,9 +759,10 @@ static int sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) unsigned int data_len = 24; char *buf; - rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); + rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); if (!rq->special_vec.bv_page) return BLKPREP_DEFER; + clear_highpage(rq->special_vec.bv_page); rq->special_vec.bv_offset = 0; rq->special_vec.bv_len = data_len; rq->rq_flags |= RQF_SPECIAL_PAYLOAD; @@ -791,9 +793,10 @@ static int sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap) u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); u32 data_len = sdp->sector_size; - rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); + rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); if (!rq->special_vec.bv_page) return BLKPREP_DEFER; + clear_highpage(rq->special_vec.bv_page); rq->special_vec.bv_offset = 0; rq->special_vec.bv_len = data_len; rq->rq_flags |= RQF_SPECIAL_PAYLOAD; @@ -821,9 +824,10 @@ static int sd_setup_write_same10_cmnd(struct scsi_cmnd *cmd, bool unmap) u32 nr_sectors = blk_rq_sectors(rq) >> (ilog2(sdp->sector_size) - 9); u32 data_len = sdp->sector_size; - rq->special_vec.bv_page = alloc_page(GFP_ATOMIC | __GFP_ZERO); + rq->special_vec.bv_page = mempool_alloc(sd_page_pool, GFP_ATOMIC); if (!rq->special_vec.bv_page) return BLKPREP_DEFER; + clear_highpage(rq->special_vec.bv_page); rq->special_vec.bv_offset = 0; rq->special_vec.bv_len = data_len; rq->rq_flags |= RQF_SPECIAL_PAYLOAD; @@ -1287,7 +1291,7 @@ static void sd_uninit_command(struct scsi_cmnd *SCpnt) u8 *cmnd; if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) - __free_page(rq->special_vec.bv_page); + mempool_free(rq->special_vec.bv_page, sd_page_pool); if (SCpnt->cmnd != scsi_req(rq)->cmd) { cmnd = SCpnt->cmnd; @@ -3635,6 +3639,13 @@ static int __init init_sd(void) goto err_out_cache; } + sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0); + if (!sd_page_pool) { + printk(KERN_ERR "sd: can't init discard page pool\n"); + err = -ENOMEM; + goto err_out_ppool; + } + err = scsi_register_driver(&sd_template.gendrv); if (err) goto err_out_driver; @@ -3642,6 +3653,9 @@ static int __init init_sd(void) return 0; err_out_driver: + mempool_destroy(sd_page_pool); + +err_out_ppool: mempool_destroy(sd_cdb_pool); err_out_cache: @@ -3668,6 +3682,7 @@ static void __exit exit_sd(void) scsi_unregister_driver(&sd_template.gendrv); mempool_destroy(sd_cdb_pool); + mempool_destroy(sd_page_pool); kmem_cache_destroy(sd_cdb_cache); class_unregister(&sd_disk_class); |