-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/13/2014 01:40 PM, Peter Zijlstra wrote:
> So the problem with the above is the lack of fwd progress; if > there's enough clone()/exit() happening in the thread group (and > the more CPUs the more possible), we'll keep repeating. We can fall back to taking the lock if we circle around, or if there is a writer active when we are in seqcount_read, similar to what the semaphore (ipc/sem.c) code is doing. read_seqbegin_or_lock would do the trick... -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJT66VgAAoJEM553pKExN6D1lMH/3/+5vCSsVAyOVLi/xFb7lmt BhRoMJO5MtDaNV32thh8kv9m1Q6r8FqtExUN6aZkTGj6Gp8nAnKFi0tR7na6nwfv dlxCP9Q8ETiGhhE1jcJLOfv8lut5PzkR8LvorUHIU3v9wuZMZHEZB4dV/Uc6Ntsf Ek4iT6QYUUGz8zgmPN4DWZ3k86vof3BOQjzFCaQMMTp4W2fGUVNpTEG+h9fHv42w SzLwCUpj/9UQ2Y+V7rQki2bKtcXNjZoOFMdcNL9AsAaeAbSWQyxXCGf5ku2kXKS6 GnxgXNX2rDGhkL8g61ZB3hq1bbWkgPDte8run9wKI3OU1Z0Pg+oxpe0HFC5Hoag= =SACY -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
