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Date: Sat, 21 Nov 2015 15:27:03 +0100 From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com> To: Eric Dumazet <eric.dumazet@...il.com>, Nikolay Aleksandrov <razor@...ckwall.org> Cc: netdev@...r.kernel.org, davem@...emloft.net Subject: Re: [PATCH net-next 7/9] net: ipmr: remove SLAB_PANIC On 11/21/2015 03:23 PM, Eric Dumazet wrote: > On Sat, 2015-11-21 at 14:01 +0100, Nikolay Aleksandrov wrote: >> From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com> >> >> It's not necessary to panic upon allocation failure, returning an error >> at that point is okay because user-space won't be able to use any of the >> ops since they didn't get registered and the default table is null. >> >> Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com> >> --- >> net/ipv4/ipmr.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c >> index a006d96d6cd9..2c7fa584a274 100644 >> --- a/net/ipv4/ipmr.c >> +++ b/net/ipv4/ipmr.c >> @@ -2675,7 +2675,7 @@ int __init ip_mr_init(void) >> >> mrt_cachep = kmem_cache_create("ip_mrt_cache", >> sizeof(struct mfc_cache), >> - 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, >> + 0, SLAB_HWCACHE_ALIGN, >> NULL); >> if (!mrt_cachep) >> return -ENOMEM; > > This runs at boot time. > > I very much prefer a panic instead of having to deal with a host with a > probable bug in mm layer at this point. > Right, I was unsure about this one, I tried to rely on the ipmr_get_table() returning NULL but I guess it's better to be safe than sorry. I'll respin with the panic in place and removed null check. > For IPv6, it is a different matter as it might be a module, thus > ip6_mr_init() does not use SLAB_PANIC Yep, I saw. It wasn't the reason I removed this one. Thanks for the review! -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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