Hi! > > well, we can perfectly do 128K block... just read 128K into userspace > > buffer, flush it via single write to block device. That should get us > > very close enough to media speed. > > That'll help naturally, 128k sync blocks will be very close to async > performance for most cases. Most cases here being drives with write back > caching enabled, if that is disabled async will still be a big win. > > Is there any reason _not_ to just go with async io? Usually the code is > just as simple (or simpler), since the in-kernel stuff is inherently > async to begin with. Keeping it simple... when we are moving to doing writeback in userland, anyway. Pavel -- Web maintainer for suspend.sf.net (www.sf.net/projects/suspend) wanted... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- References:
- [ 00/10] [Suspend2] Modules support.
- From: Nigel Cunningham <[email protected]>
- Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Nigel Cunningham <[email protected]>
- Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Pavel Machek <[email protected]>
- Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Nigel Cunningham <[email protected]>
- Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Pavel Machek <[email protected]>
- Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Jens Axboe <[email protected]>
- Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Pavel Machek <[email protected]>
- Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- From: Jens Axboe <[email protected]>
- [ 00/10] [Suspend2] Modules support.
- Prev by Date: Re: [PATCH] Fix build failure in recent pm_prepare_* changes.
- Next by Date: Re: Check for references to discarded sections during build time
- Previous by thread: Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- Next by thread: Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
- Index(es):
 |