Red Hat Bugzilla – Bug 808317
NFS: Kernel compilation is too slow
Last modified: 2014-03-30 21:28:55 EDT
Kernel compilation takes forever when compiled on NFS mount. The same is pretty fast on FUSE mount. Nothing is listed in the NFS logs.
Reproducing is straight forward:
* Extract the kernel.
* Create a default config.
Sac, what is the setup like? can I access it?
With ntpd stopped and ntpdate synced with pool.ntp.org (the time difference was in milliseconds). The compilation continues faster. However, this was not really consistent, it used to work sometimes and sometimes it didn't (depending on the distribution of files on the server). And in 3.2.6 slowness was never experienced at all.
We need to document his in our FAQ or somewhere. Also, if the logging can somehow improved to detect this, it would help.
Removing the blocker flag as this looks like a setup issue.
I am not sure if I have enough details to mark this as fixed. I could reproduce this today after disabling all sorts of caching is NFS.
Maybe we can mark this as known issue when caching is disabled?
With caching disabled, this would be expected. Hence we don't see the need for documenting expected behavior.