On Tue, Apr 29, 2008 at 9:19 PM, Erez Zadok <ezk@xxxxxxxxxxxxx> wrote: > In message <20080429133201.GA9938@xxxxxxxxxxxxxxxxxxxxx>, bsn.0007@xxxxxxxxx writes: > > Hi, > > > > I went through Bharata's RFC post on glibc based Union Mount readdir solution > > (http://lkml.org/lkml/2008/3/11/34) and have come up with patches > > against glibc to implement the same. > [...] > > The last set of discussions on glibc support ended, as I understood it, with > the glibc people objecting to such "special-purpose" code in glibc. See > <http://lkml.org/lkml/2008/3/11/66>. So has anything changed behind the > scenes, or is this idea unlikely to be merged into glibc any time soon, if > ever. (Personally I'd love to rip out the readdir-related code from unionfs > if glibc supported the same.) > > > > Patch 1. readdir support for union mounted directories. > > I am caching the dirent names in a list to aid duplicate elimination. > > And this cache is stored in DIRP. For duplicate elimination I am using > > strcmp(). I am not sure if this works universally with different types > > of filesystems. Any suggestions here would be welcome. > [...] > > You might consider using a hash table instead of a list; it'll be faster in > case where there are a lot of whiteouts/duplicates to process. > Yes, hash table was one of the things i had considered to use as a cache. But i am not completely sure how this would support seekdir. Any suggestions are greatly welcome. Regards Nagabhushan -- 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
