Marc E. Fiuczynski wrote:
Hi Shailabh,
Tried using your version of cfq-iosched.c in 2.6.8.1. On boot it would get the following debug message, which appears to be caused by the call to mempool_alloc() from cfq_get_queue. The 2.6.8.1 version of cfq-iosched.c calls mempoll_alloc with a GFP_ATOMIC flag rather than GFP_NOIO. Any way, I'll wait for you to finish the port of your work in e16 to 2.6.8.1.
Thanks - that doesn't look good. Will look into it when I get back to the iosched.
-- Shailabh
Sep 17 15:06:38 mef-work-laptop kernel: Debug: sleeping function called from invalid context at mm/mempool.c:197 Sep 17 15:06:38 mef-work-laptop kernel: in_atomic():0[expected: 0], irqs_disabled():1 Sep 17 15:06:38 mef-work-laptop kernel: [<02114e4c>] __might_sleep+0x82/0x8c Sep 17 15:06:38 mef-work-laptop rpc.statd[1131]: Version 1.0.6 Starting Sep 17 15:06:38 mef-work-laptop kernel: [<021458f6>] mempool_alloc+0x68/0x237 Sep 17 15:06:38 mef-work-laptop kernel: [<021155ff>] autoremove_wake_function+0x0/0x2d Sep 17 15:06:38 mef-work-laptop kernel: [<02145907>] mempool_alloc+0x79/0x237 Sep 17 15:06:38 mef-work-laptop kernel: [<021155ff>] autoremove_wake_function+0x0/0x2d Sep 17 15:06:38 mef-work-laptop kernel: [<02213b4e>] cfq_get_queue+0x4c/0xac Sep 17 15:06:38 mef-work-laptop kernel: [<02213bd4>] __cfq_enqueue+0x26/0x141 Sep 17 15:06:38 mef-work-laptop kernel: [<02213d78>] cfq_enqueue+0x31/0x63 Sep 17 15:06:38 mef-work-laptop kernel: [<0220a0f2>] __elv_add_request+0x35/0x6a Sep 17 15:06:38 mef-work-laptop kernel: [<0220cfda>] __make_request+0x51c/0x5d4 Sep 17 15:06:38 mef-work-laptop kernel: [<0220d21e>] generic_make_request+0x18c/0x19c Sep 17 15:06:38 mef-work-laptop kernel: [<0220d2d2>] submit_bio+0xa4/0xac Sep 17 15:06:38 mef-work-laptop kernel: [<0216c7f5>] submit_bh+0x5e/0x101 Sep 17 15:06:38 mef-work-laptop kernel: [<021b4521>] ext3_get_inode_loc+0x1a0/0x20d Sep 17 15:06:38 mef-work-laptop kernel: [<021b4645>] ext3_read_inode+0x2e/0x301 Sep 17 15:06:38 mef-work-laptop kernel: [<02185398>] alloc_inode+0x12/0x14f Sep 17 15:06:38 mef-work-laptop kernel: [<021865b0>] get_new_inode_fast+0xb5/0x21f Sep 17 15:06:38 mef-work-laptop kernel: [<021b6468>] ext3_lookup+0x57/0x89 Sep 17 15:06:38 mef-work-laptop kernel: [<0217707b>] real_lookup+0x73/0xde Sep 17 15:06:38 mef-work-laptop kernel: [<021773dd>] do_lookup+0x43/0x72 Sep 17 15:06:38 mef-work-laptop kernel: [<021779bd>] link_path_walk+0x5b1/0x1048 Sep 17 15:06:38 mef-work-laptop kernel: [<0214bded>] cache_free_debugcheck+0x192/0x199 Sep 17 15:06:38 mef-work-laptop kernel: [<021786cd>] path_lookup+0xfd/0x104 Sep 17 15:06:38 mef-work-laptop kernel: [<02178d35>] open_namei+0xa0/0x566 Sep 17 15:06:38 mef-work-laptop kernel: [<02166a48>] filp_open+0x23/0x3c Sep 17 15:06:38 mef-work-laptop kernel: [<0214a904>] poison_obj+0x1b/0x33 Sep 17 15:06:38 mef-work-laptop kernel: [<0214c201>] cache_alloc_debugcheck_after+0xc6/0xf4 Sep 17 15:06:38 mef-work-laptop kernel: [<02166f71>] sys_open+0x31/0x62 Sep 17 15:06:38 mef-work-laptop kernel: [<02100491>] init+0x196/0x1f8 Sep 17 15:06:38 mef-work-laptop kernel: [<021002fb>] init+0x0/0x1f8 Sep 17 15:06:38 mef-work-laptop kernel: [<021035b9>] kernel_thread_helper+0x5/0xb
Marc
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