On 12/02/2010 01:41 PM, Mike Fedyk wrote: > On Wed, Dec 1, 2010 at 8:28 PM, Yan, Zheng <yanzh...@21cn.com> wrote: >> On Thu, Dec 2, 2010 at 11:42 AM, liubo <liubo2...@cn.fujitsu.com> wrote: >>> On 12/01/2010 06:20 PM, liubo wrote: >>>> When the filesystem is readonly, avoid transaction stuff by checking >>>> MS_RDONLY at >>>> start transaction time. >>>> >>> This patch may lead btrfs panic. >>> >>> Since btrfs allows transaction under readonly fs state, which is a bit >>> weird, btrfs >>> does not even check the returned transaction from start_transaction, >>> although it may >>> return -ENOMEM. >> btrfs may do log replay even mount as readonly. >> > > What part is logged besides tree roots and/or superblocks?
log tree is used for log replay after crash and fast fsync and O_SYNC, it logs inodes. > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
