Messages in this thread |  | | | Date | Fri, 8 Feb 2002 11:11:50 -0800 (PST) | | From | Linus Torvalds <> | | Subject | Re: [RFC] New locking primitive for 2.5 |
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On Fri, 8 Feb 2002, Andrew Morton wrote: > > Yesterday, Ingo said: > > > i think one example *could* be to turn inode->i_sem into a combi-lock. Eg. > > generic_file_llseek() could use the spin variant. > > > > this is a real performance problem, i've seen scheduling storms in > > dbench-type runs due to llseek taking the inode semaphore.
... so just make it a spinlock instead.
The semaphore is overkill, as the only thing we're really protecting is one 64-bit access against other updates.
Linus
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