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: Thu, 29 Jan 2015 19:48:06 -0500 From: "Martin K. Petersen" <martin.petersen@...cle.com> To: "Darrick J. Wong" <darrick.wong@...cle.com> Cc: Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@...radead.org>, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org, Jeff Layton <jlayton@...chiereds.net>, "J. Bruce Fields" <bfields@...ldses.org> Subject: Re: [RESEND] [PATCH] block: create ioctl to discard-or-zeroout a range of blocks >>>>> "Darrick" == Darrick J Wong <darrick.wong@...cle.com> writes: Darrick> Create a new ioctl to expose the block layer's newfound ability Darrick> to issue either a zeroing discard, a WRITE SAME with a zero Darrick> page, or a regular write with the zero page. This BLKZEROOUT2 Darrick> ioctl takes {start, length, flags} as parameters. So far, the Darrick> only flag available is to enable the zeroing discard part -- Darrick> without it, the call invokes the old BLKZEROOUT behavior. Darrick> start and length have the same meaning as in BLKZEROOUT. Darrick> Furthermore, because BLKZEROOUT2 issues commands directly to Darrick> the storage device, we must invalidate the page cache (as a Darrick> regular O_DIRECT write would do) to avoid returning stale cache Darrick> contents at a later time. Looks good to me, Darrick. Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com> -- Martin K. Petersen Oracle Linux Engineering -- 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