lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 01 Jun 2011 17:09:55 +0900 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Shaohua Li <shaohua.li@...el.com>, Tejun Heo <tj@...nel.org>, Jens Axboe <jaxboe@...ionio.com>, Greg Kroah-Hartman <gregkh@...e.de> Subject: [025/165] block: add a non-queueable flush flag 2.6.39-stable review patch. If anyone has any objections, please let us know. ------------------ Content-Length: 2189 Lines: 66 From: "shaohua.li@...el.com" <shaohua.li@...el.com> commit f3876930952390a31c3a7fd68dd621464a36eb80 upstream. flush request isn't queueable in some drives. Add a flag to let driver notify block layer about this. We can optimize flush performance with the knowledge. Stable: 2.6.39 only Signed-off-by: Shaohua Li <shaohua.li@...el.com> Acked-by: Tejun Heo <tj@...nel.org> Signed-off-by: Jens Axboe <jaxboe@...ionio.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- block/blk-settings.c | 6 ++++++ include/linux/blkdev.h | 7 +++++++ 2 files changed, 13 insertions(+) --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -790,6 +790,12 @@ void blk_queue_flush(struct request_queu } EXPORT_SYMBOL_GPL(blk_queue_flush); +void blk_queue_flush_queueable(struct request_queue *q, bool queueable) +{ + q->flush_not_queueable = !queueable; +} +EXPORT_SYMBOL_GPL(blk_queue_flush_queueable); + static int __init blk_settings_init(void) { blk_max_low_pfn = max_low_pfn - 1; --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -364,6 +364,7 @@ struct request_queue * for flush operations */ unsigned int flush_flags; + unsigned int flush_not_queueable:1; unsigned int flush_pending_idx:1; unsigned int flush_running_idx:1; unsigned long flush_pending_since; @@ -843,6 +844,7 @@ extern void blk_queue_softirq_done(struc extern void blk_queue_rq_timed_out(struct request_queue *, rq_timed_out_fn *); extern void blk_queue_rq_timeout(struct request_queue *, unsigned int); extern void blk_queue_flush(struct request_queue *q, unsigned int flush); +extern void blk_queue_flush_queueable(struct request_queue *q, bool queueable); extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev); extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *); @@ -1111,6 +1113,11 @@ static inline unsigned int block_size(st return bdev->bd_block_size; } +static inline bool queue_flush_queueable(struct request_queue *q) +{ + return !q->flush_not_queueable; +} + typedef struct {struct page *v;} Sector; unsigned char *read_dev_sector(struct block_device *, sector_t, Sector *); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists