Jeremy Fitzhardinge 35c7422649 [PATCH] x86: deflate stack usage in lib/inflate.c ... inflate_fixed and huft_build together use around 2.7k of stack. When using 4k stacks, I saw stack overflows from interrupts arriving while unpacking the root initrd: do_IRQ: stack overflow: 384 [<c0106b64>] show_trace_log_lvl+0x1a/0x30 [<c01075e6>] show_trace+0x12/0x14 [<c010763f>] dump_stack+0x16/0x18 [<c0107ca4>] do_IRQ+0x6d/0xd9 [<c010202b>] xen_evtchn_do_upcall+0x6e/0xa2 [<c0106781>] xen_hypervisor_callback+0x25/0x2c [<c010116c>] xen_restore_fl+0x27/0x29 [<c0330f63>] _spin_unlock_irqrestore+0x4a/0x50 [<c0117aab>] change_page_attr+0x577/0x584 [<c0117b45>] kernel_map_pages+0x8d/0xb4 [<c016a314>] cache_alloc_refill+0x53f/0x632 [<c016a6c2>] __kmalloc+0xc1/0x10d [<c0463d34>] malloc+0x10/0x12 [<c04641c1>] huft_build+0x2a7/0x5fa [<c04645a5>] inflate_fixed+0x91/0x136 [<c04657e2>] unpack_to_rootfs+0x5f2/0x8c1 [<c0465acf>] populate_rootfs+0x1e/0xe4 (This was under Xen, but there's no reason it couldn't happen on bare hardware.) This patch mallocs the local variables, thereby reducing the stack usage to sane levels. Also, up the heap size for the kernel decompressor to deal with the extra allocation. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Tim Yamin <plasmaroo@gentoo.org> Cc: Andi Kleen <ak@suse.de> Cc: Matt Mackall <mpm@selenic.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com>		2007-05-02 19:27:15 +02:00
..
boot	[PATCH] x86: deflate stack usage in lib/inflate.c	2007-05-02 19:27:15 +02:00
kernel	[PATCH] arch/arm26/kernel/entry.S: remove dead code	2007-03-01 14:53:35 -08:00
lib
machine
mm
nwfpe
ACKNOWLEDGEMENTS
defconfig
Kconfig	[PATCH] Set CONFIG_ZONE_DMA for arches with GENERIC_ISA_DMA	2007-02-11 10:51:19 -08:00
Kconfig.debug
Makefile