On Mon, 22 May 2006 02:27:09 PDT, Andrew Morton said: > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc4/2.6.17-rc4-mm3/ Mostly works, am chasing down 3 small things (all 3 were new as of -mm2 - I was busy chasing them when -mm3 showed up). 1) Something has gone astray in the hardware RNG rework. /sbin/rngd was quite happy dealing with the i810 RNG in my laptop under -rc4-mm1, but under -mm2 and -mm3, I get this (from strace /bin/rngd): open("/dev/hw_random", O_RDONLY) = 3 read(3, "q\252cg", 4) = 4 read(3, 0xbfaf56ac, 4) = -1 EAGAIN (Resource temporarily unavai lable) It works for some number of reads, but eventually pulls an EAGAIN. When stracing on a console that was slow-to-scroll, it did several dozen before failing - so it's apparently a timing thing. I stuck a debugging printk in just before the test that returns EAGAIN, and got this: [ 68.361000] rng_read data_present=1 i=0 bytes_read=1 [ 68.361000] rng_read data_present=1 i=0 bytes_read=1 [ 68.361000] rng_read data_present=1 i=0 bytes_read=1 [ 68.361000] rng_read data_present=1 i=0 bytes_read=1 [ 68.361000] rng_read data_present=0 i=20 bytes_read=0 It looks to me line the old code stayed in a while() loop in rng_dev_read until it had fulfilled the read request (including possibly multiple calls to need_resched() and friends). The new code will bail on an -EAGAIN as soon as the *first* poll fails, rather than waiting until something is available - even if it is NOT flagged O_NONBLOCK. 2) Building modules, stage 2. MODPOST WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.data: from .text between 'acpi_processor_power_init' (at offset 0xf5e) and 'acpi_safe_halt' 3) Something in git-cryptodev.patch doesn't play nice with RedHat Fedora's 'modsign' patches. I'm suspecting this is the cause: commit f1c737f209e39095016e5be3904b2ce84027890f Author: Herbert Xu <[email protected]> Date: Tue May 16 22:09:29 2006 +1000 [CRYPTO] all: Pass tfm instead of ctx to algorithms I just haven't stared at it enough to make the fixes needed.
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