On Sat, 23 Jun 2012, R, Sricharan wrote: > Hi, > I am observing a below crash with VMALLOC call on mainline kernel. > The issue happens when there is insufficent vmalloc space. > Isn't it expected that the API should return a NULL instead of crashing when > there is not enough memory?. Yes. > This can be reproduced with succesive vmalloc > calls for a size of about say 10MB, without a vfree, thus exhausting > the memory. > > Strangely when vmalloc is requested for a large chunk, then at that time API > does not crash instead returns a NULL correctly. > > Please correct me if my understanding is not correct.. > > -------------------------------------------------------------------------------------- > > [ 345.059841] Unable to handle kernel paging request at virtual > address 90011000 > [ 345.067063] pgd = ebc34000 > [ 345.069793] [90011000] *pgd=00000000 > [ 345.073383] Internal error: Oops: 5 [#1] PREEMPT SMP ARM > [ 345.078685] Modules linked in: bcmdhd cfg80211 inv_mpu_ak8975 > inv_mpu_kxtf9 mpu3050 > [ 345.086380] CPU: 0 Tainted: G W (3.4.0-rc1-05660-g0d4b175 #1) > [ 345.093351] PC is at vmap_page_range_noflush+0xf0/0x200 > [ 345.098569] LR is at vmap_page_range+0x14/0x50 > [ 345.103005] pc : [<c01091c8>] lr : [<c01092ec>] psr: 80000013 > [ 345.103009] sp : ebc41e38 ip : fe000fff fp : 00002000 > [ 345.114472] r10: c0a78480 r9 : 90011000 r8 : c096e2ac > [ 345.119685] r7 : 90011000 r6 : 00000000 r5 : fe000000 r4 : 00000000 > [ 345.126198] r3 : 50011452 r2 : f385c400 r1 : fe000fff r0 : f385c400 > [ 345.132713] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user > [ 345.139835] Control: 10c5387d Table: abc3404a DAC: 00000015 Couple requests: - since you're already running an -rc kernel, would it be possible to try 3.5-rc4, which was released today, instead? - could you disassemble vmap_page_range_noflush and post the output or map the offset back to the line in the code? Thanks! -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>