Hi Christoph, I have to take care the cache problem If using the bio directly. BHs can be released by kernel when necessary. Is there any existing code using bio to read/write metadata blocks? How do they handle the timing freeing bios? I really wish to learn something form it. Regards. Cong Meng. On Fri, Oct 8, 2010 at 4:22 PM, Christoph Hellwig <hch@xxxxxx> wrote: > On Thu, Oct 07, 2010 at 02:31:14PM -0700, Daniel Phillips wrote: >> Hi Meng, >> >> The patch looks sensible, however the question is: why do you want to >> do this? Would it not be better to generalize your metadata format to >> accomodate the device's native blocksize? > > Even if it uses fixed 4k sectors it should just read them in smaller > chunks OR even better stop using buffer heads and just read them > manually using submit_bio. BHs really shouldn't be used outside of > filesystems, and even there they slowly are on their way out. > > -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
